96 DE. G. S. BRADT ON MTODOCOPA OBTAINED 



Genus Ccwchcecissa. Claus. 

 Conchcecissa imbricvta, G. S. Brady. 

 1880. Halocypris imbricata, G. S. Bradj^ Report 011 the Ostracodaof the ' Challenger ' Expedition, 

 p. 167. 



1890. Conchmcissa armata, Claus, Die Gattungen und Arten der mediterranen und atlantischen 



Halocypriden, pp. 19, 20. 



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



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



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

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

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



Genus Pseudoconchcecia, Claus. 

 Pseudoconchcecia serrulata, Claus. (Plate XVII. figs. 22-24.) 



1874. Conchcecia serrulata, 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. Pseudoconchcecia serrulata, Clans, Die Gattungen und Arten der mediterranen und atlant- 



ischen Halocypriden, p. 20. 



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



nieeres, 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 Pseudoconchcecia 

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

 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- 

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

 lanceolated or spathulate extremities. All the setae 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 seta? of other 

 species (perhaps, indeed, of all the Halocypridse) 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 setae of the Cypridinidae. 



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



