272 



compounds in the unfertilized egg of 

 Arbacia punctulata. Biol. Bull. 79 : 354- 



355- 



Navez, a. E. and Harvey, E.B. 1935. Indo- 

 phenol oxidase activity in intact and frag- 

 mented Arbacia eggs. Biol. Bull. 69 : 342 

 (Abstract). 



Nebel, B. R. 1937. Cytological observa- 

 tions on colchicine. Biol. Bull. 73 :35i- 

 352 (Abstract). 



, Harvey, E. B. and Hollaender, A. 



1937. The cytology of Arbacia punctulata 

 activated by monochromatic ultraviolet 

 radiation. Biol. Bull. 73 : 365-366 (Ab- 

 stract) . 



and Ruttle, M. L. 1938. The cyto- 

 logical and genetical significance of col- 

 chicine. J. Heredity 29 : 3-9. 



Needham, J. 1 93 1. Chemical Embryology. 

 Cambridge Univ. Press. 



. 1942. Biochemistry and Morphogenesis. 



Cambridge Univ. Press. 



and Moore, A. R. 1929. Herma- 

 phroditism in Dendraster. Science 70 : 357. 



and Needham, D. M. 1926. a. The 



hydrogenion concentration and oxidation 

 reduction potential of the cell interior 

 before and after cleavage. A micro-injec- 

 tion study on marine eggs. Proc. Roy. Sac. 

 London B 99 : 173-199. 



— and — . 1926. b. The oxida- 

 tion-reduction potential of protoplasm: 

 A review. Protoplasma i : 255-294. 



and . 1930. On phosphorus 



metabolism in embryonic life. I. Inver- 

 tebrate eggs. J. Exp. Biol. 7 : 317-348. 



and . 1940. A note on the 



biochemistry of embryonic determination 

 in Echinoderms. J. Exp. Biol. 17 : 147- 

 152. 



Neefs, Y. 1937. Sur divers cas d'hermaphro- 

 disme fonctionnel chez I'oursin Strongylo- 

 centrotus lividus. C. R. Acad. Sci. Paris 

 204 : 900-902. 



. 1952. Sur le cycle sexuel de Sphaer- 



echinus granularis L. C. R. Acad. Sci. Paris 

 234 : 2233-2235. 



. 1953. Divers cas d'hermaphrodisme 



chcz I'oursin Arbacia lixula L. Bull. Biol, 

 de la France et de la Belgique 87 : 461-468. 



Neff, R. J. 1953. Isolation of midpieces 

 from the sperm of Arbacia punctulata and 

 observations on the role of the midpiece 

 in sperm motility. Biol. Bull. 105 : 367- 

 368 (Abstract). 



Nelson, C. and Brooks, S. C. 1933. Effect 

 of infrared on subsequent fertilization of 

 the eggs of certain marine invertebrates. 

 Proc. Soc. Exper. Biol, and Med. 30 : 1007- 

 1009. 



Nelson, L. 1948. Usnic acid, an antibiotic, 



BIBLIOGRAPHY 



and sperm metabolism. Biol. Bull. 95: 

 286-287 (Abstract). 



Nelson, L. 1949 Sulfhydryl inhibitors and a 

 seminal fluid factor in sperm respiration. 

 Biol. Bull. 97 : 259-260 (Abstract). 



Noll, F. C. 1881. Mein Seewasser- 

 Zimmeraquarium. Der ^oologische Garten 

 221 : 138-177. 



Norman, W. W. 1896. Segmentation of the 

 nucleus without segmentation of the pro- 

 toplasm. Arch. f. Eniwick. 3 : 106-126. 



N0RR15, C. H. 1939. The tension ?.t the sur- 

 face, and other physical properties of the 

 nucleated erythrocyte. J. Cell, and Comp. 

 Physiol. 14 : 1 17-133. 



Northrop, J. H. 1927. Kinetics of the swel- 

 ling of cells and tissues. J. Gen. Physiol. 

 I r : 43-56. 



. 1947. Action of papain and ficin on 



tadpoles and Arbacia eggs. J. Gen. Physiol. 

 30 : 375-376. 



Numann, W. 1933. Untersuchungen der 

 Skelette an Varianten, Bastarden und 

 Chimaren von regularen und irregularen 

 Seeigeln. Z^it. f. induk. Abstamm. u. Ver- 

 erbungsl. 65 : 447-522. 



Oddo, a. M. and Esposiro, M. 1951. Chan- 

 ges in the potassium content of sea urchin 

 eggs on fertilization. J. Gen. Physiol. 34 : 

 285-293. 



Ohman, L. O. 1940. t)ber die Veranderung 

 des respiratorischen Quotienten wahrend 

 der Friihentwicklung des Seeigeleies. Arkiv 

 f. Zpol- 32A, No. 15 : 1-9. 



. 1945. On the lipids of the sea urchin 



egg. Arkiv J. ^ool. 36A, no. 7 : 1-95. 



Ohshiwa, H. 1 92 1. Inhibitory effect of 

 dermal secretion of the sea urchin upon 

 the fertilizability of the egg. Science 54: 

 578-580. 



Onoda, K. 1 93 1 . Notes en the development 

 of Heliocidaris crassispina with special 

 reference to the structure of the larval 

 body. Mem. Coll. Sci. Kyoto Imp. Univ. Ser. 

 B. 7; 103-134. 



. 1936. Notes on the development ot 



some Japanese Echinoids with special 

 reference to the structure of the larval 

 body. Jap. J. ^ool. 6 : 637-654. 



Orstrom, a. 1932. a. Zur Analyse der At- 

 mungssteigerung bci der Befruchtung des 

 Seeigeleies auf der Grundlage von Ver- 

 suchen iiber Oxidation und Reduktion 

 von Dimethylparaphenylendiamin in der 

 Eizelle. Protoplasma 15 : 566-589. 



. 1932. b. Uber die Wirkung KCN- 



haltiger hypertonischer Losungen auf den 

 StoflFwechsel und die Entwicklung^erre- 

 gung des Seeigeleies. Arkiv f. /^W. 24 B, 

 no. 7:1-5- 



