no. 1051. REPORT OH THE OSTRACODA—SHARPE. 413 



Subfamily HEEPETI )CYr j KII3IlSr^K. 



12. ILYODROMUS Sars, 1894. 



Erpetocypris Brady and Xoumax, Trans. Royal Dublin Soc. ISNit, p. 84. 

 Herpetocypris Saks, Forh. Vid. Selsk. Christiania, No. 1. L890, p. <',it. 

 Cypris Yayka. Arch. Naturw. Durchforsch. Bohmen, VIII, 1891, p. 82. 

 Erpetocypris Cronebebg, Bull. Soc. Imp. d. Moscou, 1894, p. 14. 

 Ilyodromus Sabs, Vid. Selsk. Skr. Math. Natur. Klasse, 1894, p. 38. — Kavf- 



siaxn, Revue Suisse de Zool., VIII, 1900, p. 298. — Shabpe, Proe. U. S. 



Nat. .Mus., XXVI, L903, p. 975.— Muixer, Ergeb. der deutsch. Tiefsee- 



Expedition, 1898-99, VII, 1906, p. 136 (Valdivia). 



Natatory seta- sparse and much shortened. Surface of shell of 

 most species striated longitudinally. First maxillary process with 

 two toothed spines. Caudal ramus ending in three strong claws 

 which increase in length distally, the usual dorsal seta being replaced 

 by a spine or claw. Terminal seta present as usual. Propagation 

 sexual. 



Remarks. — This genus was first established by Prof. G. (). Sars 

 in 181)4 to receive a new species from New Zealand. As originally 

 described, it was one of two new subdivisions of the genus Herpeto- 

 cypris, the other division being the genus Candonocypris, which 

 seems to be less definitely established, as the distinction rests very 

 largely upon comparative size and overlapping of valves of shells. 

 Candonocypris appears little more, therefore, than at most a sub- 

 genus of the genus Herpetocypris. Sars evidently found no males, 

 hence describes the genus "with propagation exclusively partheno- 

 genetical." The collections belonging to the U. S. National Museum 

 contained at least one male, hence the generic description is revised 

 to that extent. 



21. ILYODROMUS PECTINATUS, new species. 



Plate I.\ II. figs. 1-5. 



Length of male. Lis mm.; height. 0.58 mm.; breadth, ().4!> mm. 

 Female slightly smaller. 



Shell sparsely covered with small papillar elevations, and showing 

 Small parallel longitudinal striatums (fig. 1). 



Seen from the side (fig. 1). the shell is twice as long as high, the 

 upper margin evenly and gently curved, the lower vdixv nearly 

 straight, weakly sinuate. 



Seen from above (fig. 4), the shell is narrowly oval, both ends 

 similar. 



The second antenna' are large, terminal claws as long as the last 

 two segments. Natatory seta' very rudimentary, scarcely noticeable. 

 The two spines of the first maxillary process stout and toothed. 



Terminal claw of second foot (fig. 5) stout, broad, nearly straight, 

 with curved tip. 



