48o DISCOVERY REPORTS 



The chief features of the internal structure of the nervous system are described and 

 figured. The tritocerebrum is pecuhar in that a central body occurs in the tritocerebral 

 commissure. 



The segmental excretory organs are antennal glands, and not maxillary glands as in 

 the Cypridae. The glands show a typical structure, and there is a well-defined sphincter 

 between end sac and duct. 



LITERATURE CITED 



Baumann, H., 1921. Das Gefaszsystem von Astacus fluviatilis. Zs. wiss. Zool. Leipzig, cxviii, p. 246. 

 Bergold, a., 1910. Beitrdge sur Kenninis des innern Banes der Susszvasser Ostracoden. Zool. Jahrb. Jena, 



Abt. f. Anat., xxx, p. i. 

 Cannon, H. G., 1924. On the Development of an Estherid Crustacean. Phil. Trans. R. Soc. London, Ser. B, 



ccxn, p. 395. 

 1925. On the Segmental Excretory Organs of Certain Fresh-Water Ostracods. Phil. Trans. R. Soc. 



London, Ser. B, ccxiv, p. i. 



1926 a. On the Feeding Mechanism of a Freshwater Ostracod, Pionocypris vidua. J. Linn. Soc. Zool. 



London, xxxvi, p. 325. 



1926 b. On the Post-Embryonic Development of the Fairy Shrimp, Chirocephalus diaphanus. J. Linn. 



Soc. Zool. London, xxxvi, p. 401. 

 Cannon, H. G. and Manton, S. M., 1927. Notes on the Segmental Excretory Organs of Crustacea, I-IV. 



J. Linn. Soc. Zool. London, xxxvi, p. 439. 

 Claus, C, 1876. Utitersuchungen sur Erforschung der Genealogischen Grundlage des Crustaceen-Systems. 



Vienna. 



1 89 1. Die Halocypriden des Atlantischen Oceans und Mittelmeeres. Vienna. 



Hamaker, J., 1898. The Nervous System of Nereis virens. Bull. Mus. Comp. Zool. Cambridge, Mass. 



XXXII, p. 89. 

 Hanstrom, B., 1924. Beitrag zur Kenntnis des zentralen Nervensy stems der Ostracoden und Copepoden. 



Zool. Anz. Leipzig, LXI, p. 31. 



1927. Neue Beobachtungen iiber Augen und Sehzentren von Entomostracen, Schizopoden und Pantopoden. 



Zool. Anz. Leipzig, lxx, p. 236. 



1928. Vergleichende Anatomic des Nervensy stems der Wirbellosen Tiere. Berlin. 



Harvey, E. Newton, 1919. The Nature of Animal Light. Philadelphia and London. 



Holmgren, N., 1916. Zur vergkichenden Anatomic des Geliirn von Polychaten, Onychophoren, Arachniden, 



Crustaceen, Myriopoden u?id Insekten. K. Svenska Vet.-Ak. Handl. Stockholm, LVI, p. i. 

 Johnson, G. E., 1924. Giant Nerve Fibres in Crustaceans, with special reference to Cambarus and Palae- 



monetes. J. Comp. Neur. Psych. Philadelphia, xxxvi, p. 323. 

 Keim, W., 1915. Das Nervensystem von Astacus fluviatilis. Zs. wiss. Zool. Leipzig, cxiii, p. 485. 

 Klie, W., 1926. Biologic der Tiere Deutschlands. Teil 16. Ostracoda. Berlin. 



1929. Die Tierwelt der Nord- und Ostsee. Te.W'K.b. Ostracoda. Leipzig. 



LtJDERS, L., 1909. Gigantocypris Agassizii [Miiller). Zs. wiss. Zool. Leipzig, xcii, p. 103. 



Manton, S. M., 1928. On the Embryology of a Mysid Crustacean, Hemimysis lamornae. Phil. Trans. 



R. Soc. London, Ser. B, ccxvi, p. 363. 

 Marcus, E., 1928. Zur vergleichenden Anatomic und Histologic der Tardigraden. Zool. Jahrb. Jena, Abt. f. 



allg. Zool. XLV, p. 99. 

 Muller, G. W., 1894. Fauna und Flora des Golfes von Neapel — Die Ostracoden. Berlin. 

 1895. Reports on the Dredging Operations off the West Coast of Central America to the Galapagos. . ., 



No. 5. Die Ostracoden. Cambridge, Mass. 

 1927. Handbuch der Zoologie, gegr. von Dr Willy Kukenthal, iii, pt 4. Berlin and Leipzig. 



