http://hdl.handle.net/10125/4119 Tue, 18 Jun 2013 23:45:45 GMT 2013-06-18T23:45:45Z http://hdl.handle.net/10125/7248 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7248 1963-07-01T00:00:00Z http://hdl.handle.net/10125/7247 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7247 1963-07-01T00:00:00Z http://hdl.handle.net/10125/7146 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7146 1963-07-01T00:00:00Z Paramonov, SJ http://hdl.handle.net/10125/7145 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7145 1963-07-01T00:00:00Z St. John, Harold http://hdl.handle.net/10125/7144 In our analysis of the effect of ionizing radiation upon the cleavage of sea urchin zygotes we found it necessary to take successive photomicrographs of a large number of eggs, in different samples, which had been exposed to graded doses of ionizing radiation (Hsiao and Daniel, 1960). In order to estimate the rate of cleavage of the irradiated samples of fertilized eggs it is highly desirable to follow the cleavage of each egg in every sample and make photomicrographic records for later analysis. In other words, we need to take time-lapse pictures of the developing eggs subjected to different amounts of radiation so as to calculate the rate of cleavage and correlate it with dosage. After some preliminary trials we have put together, using commonly available materials, a simple device capable of taking photomicrographs repeatedly from the same field in a series of samples of irradiated eggs at specified time intervals. By lining up, according to time, prints made from each field, each egg can be identified and its cleavage followed from the first to the last frame in the series, and its rate of cleavage can be calculated. It occurs to us that investigators who have occasion to record developmental and other recurrent phenomena may find this simple device useful. A brief description of its method of construction and manipulation is reported in this paper. Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7144 1963-07-01T00:00:00Z Hsiao, Sidney C; Fujii, Walter K; Fine, Helen H http://hdl.handle.net/10125/7143 While studying the correlations between the distribution of five species of beach hoppers of the genus Orchestoidea and the physical and biotic factors of their sandy beach habitat, it became necessary to identify with certainty the animals collected from the many beaches sampled up and down the Californian coast. Since it was desirable tentatively to name the hoppers captured in the field, I made an effort to find characters which were easily observed on the beach and would allow such identification. As a result of my examination of many thousands of animals from over a hundred collecting localities, I evolved a recognition of the five species mainly on the basis of pigmentation patterns, elements of which are relatively consistent in spite of the many variations to be found in the total pigmentation. Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7143 1963-07-01T00:00:00Z Bowers, Darl E http://hdl.handle.net/10125/7142 In a distributional study of the black sea cucumbers, Holothuria atra (Jager) and H. leucospilota (Brandt), at Rongelap Atoll (Fig. 1) the beaches of most of the larger islets were surveyed during September 1959, March 1961, and September 1961. Estimates of abundance and size were made, and observations on temperature tolerance, predation, asexual reproduction by fission, and some other ecological aspects were considered. Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7142 1963-07-01T00:00:00Z Bonham, Kelshaw; Held, Edward E http://hdl.handle.net/10125/7141 Anemones of the California coast, collected from November 1960 to March 1961, were compared with respect to their toxicity. Aqueous extracts of the anemones were dialyzed and assayed by intraperitoneal injection to mice, and the survival times of the injected mice were compared. The extracts of Anthopleura elegantissima and A. xanthogrammica were by far more toxic than those of Metridium senile, Corynactis californica, Tealia crassicornis, T. lofotensis, and T. coriacea. The differences in potencies of the extra cts may indicate species variations m (1) toxicity, (2) efficiency of the extraction method, or (3) both. Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7141 1963-07-01T00:00:00Z Martin, Edgar J http://hdl.handle.net/10125/7140 Two samples of coral from Kaneohe Bay, Oahu, Hawaii , have each yielded a number of specimens of a new species of acrothoracican burrowing barnacle of the family Lithoglyptidae. Samples of Psammocora verrilli Vaughan collected by Stephen A. Wainwright,2 and of Porites compressa Dana collected by Charles Stasek, were referred to me by William A. Newman. These barnacles are the first representatives of the order Acrothoracica known from Hawaii. Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7140 1963-07-01T00:00:00Z Tomlinson, Jack T http://hdl.handle.net/10125/7138 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7138 1963-07-01T00:00:00Z Carlquist, Sherwin; Grant, Martin L http://hdl.handle.net/10125/7137 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7137 1963-07-01T00:00:00Z Schwabl, Mathilde http://hdl.handle.net/10125/7136 Most of us who have had some experience at sea on small power or sailing boats have noted that the sea surface is crossed by usually more than a single train or set of waves. Each train can be identified by its direction, period, and height. Sometimes one train is so dominant that others may not be noticed. The Marshall Islanders of the nineteenth century and earlier, past masters in the art of handling small boats, used wave trains as a navigational aid with their famous stick charts . The dominant train of waves, produced by the trad e winds, was designated by long parallel sticks tied to a rigid frame. Trains of smaller waves, some produced by bending around islands-were shown by small sticks attached at angles to the long ones. A brief review of these maps and of pertinent literature was given by Emery, Tracey, and Ladd (1954:5). Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7136 1963-07-01T00:00:00Z Emery, KO http://hdl.handle.net/10125/7135 Mon, 01 Jul 1963 00:00:00 GMT http://hdl.handle.net/10125/7135 1963-07-01T00:00:00Z