96 DR. G S. BRADY ON MTODOCOPA OBTAINED 



Genus CoNCHfficissA, Claus. 

 CoNCHCECissA iMBRiciTA, G. S. Brady. 

 1880. Halocypris imbricala, G. S. Brady, Report on the Ostracodaof the 'Challenger' Expedition, 

 p. 167. 



1890. Coiic/iwcissa armata, Claus, Die Gattungen und Arteu der mediterranen und atlantischen 



Halocypriden, pp. 19, 20. 



1891. ,, „ Claus, Die Halocypriden des atlantischen Oceans und Mittelmeeres, 



p. 70, pi. xvi., xvii., xviii. 

 This is referred doubtfully by Dr. Claus to his more recently described species, 

 Conchwcissa armata, and, notwithstanding the slight discrepancies referred to by that 

 author, I can scarcely doubt that the two are identical. 



Genus Pseudoconchgecia, Claus. 

 PSEUDOCONCHffiCIA SEREULATA, Claus. (Plate XVII. figs. 22-24.) 



1874. Conchmcia serridata, Claus, Die Familie der Halocypriden, p. 61, pi. i. figs. 2-7, 9-11, pi. ii. 



figs. 12, 13, 17, 19. 

 1880. Halocypris atlantica, Brady, Report on the Ostracoda of the ' Challenger ' Expedition, p. 164, 



pi. xi. figs. 1-15, pi. xli. figs. 11, 12. 



1890. Pseiidoconchcecia serrtilata, Claus, Die Gattungen und Arteu der mediterranen und atlant- 



ischen Halocypriden, p. 20. 



1891. „ „ Claus, Die Halocypriden des atlantischen Oceans und Mittel- 



meeres, p. 72, pi. xix. figs. 1-14, pi. xxiii. figs. 1-13. 



The reference of this species in the Report of the 'Challenger Expedition' to 

 Halocypris atlantica, Lubbock, can scarcely be maintained, though the figures and 

 description there given are, I think, correct so far as they go. The descriptions, both 

 of Dana and Sir John Lubbock, are so concise and vague that it is impossible to say 

 certainly to what they refer. There can, however, be no doubt that PseudGconchcecia 

 serrulata, Claus, is identical with Halocypris atlantica of the ' Challenger ' Eeport. 

 Some characters which were passed without notice in that Report I figure here — the 

 hooked appendage of the right and left male antenna (figs. 23, 24) and the swimming- 

 setae of the same limb (fig. 22). These setse are figured in order to show theirnarrowly 

 lanceolated or spathulate extremities. All the setse seem to end in this way, but the 

 two springing from the apical joint much more distinctly so than the rest : in fact, it is 

 not easy to see the slightly dilated apices of the lateral setae except by rotating them 

 so as to get a front view. But although it was in P. serrulata that I first noticed the 

 dilated apices, I now find on closer investigation that the antennal setae of other 

 species (perhaps, indeed, of all the Halocypridae) have a similar structure. This point 

 is noted (though not figured) by Prof. Claus in his definition of the subfamily 

 Conchcecinae. There seems to be no such structure in the setse of the Cypridinidae. 



P. serrulata occurred in many of the • Challenger ' gatherings. Those which I have 



