1859.] .TONES FOSSIL ENTOMOSTRACA. 267 



This somewhat reminds us both of Cypris gibba, Bamdohr*, and 

 of Cytherideis unicornis, Jonesf, in their young state before the 

 anterior and posterior tubercles of the dorsal furrow have been 

 developed into spines. Fig. 13 c is a smaller, smooth, oblong cara- 

 pace, probably the young of C. conculcata above described. 



2. Candona Candida, Miiller, sp. PI. XVI. fig. 14. 



Cypris Candida, Miiller, Entom. p. 62, pi. 6. figs. 7-9 ; Gandona 

 lucens, Baird. Hist. Brit. Entom. p. 160, pi. 19. fig. 1 ; Gandona 

 Candida, Jones, Monog. Test. Entom. p. 19, pi. 1. fig. 8. 



Judging from the imperfect materials at command, it is not pos- 

 sible to separate this fossil Cyprid of Montserrate from Midler's 

 species above indicated. 



3. Cypris (?) Montseeratexsis, spec. nov. PI. XVI. fig. 15. 



Carapace having an outline somewhat like that of the blade of a 

 cheese-knife, strongly arched (nearly semicircular) on the back, 

 straight on the ventral border ; bluntly curved at one end, obliquely 

 curved at the other ; the greatest convexity of the sides is on the 

 medial third and ventrade. 



In shape, this somewhat approaches Cypris compressa, Baird, and 

 C. Broiuniana, Jones. 



4. Cypris (?) Axxportiana, spec. nov. PI. XVI. fig. 16. 



Carapace long and narrow, subcylindrical, arched on the bark ; 

 extremities tapering, obtuse, one rather more acute than the other. 



This has a form rare among the Cyprides, and, as a Cypris, com- 

 parable only with G. clavata, Baird. Amongst marine Entornostra- 

 cans we might more readily find resemblances as to outline ; as its 

 associates, however, were apparently fluviatile or lacustrine (or at 

 most of brackish-water habits), it is preferable to keep the Cypridal 

 relationship of this small unique specimen prominent. 



The name of the discoverer of the freshwater deposits of Mont- 

 serrate and Plantaforma is associated with this species ; and it is to 

 In' Imped that further research by himself or his friends will supply 

 us with more abundant materials. 



5. Cypris (?). PI. XVI. fig. I 7. 



This suhoblong, slightly curved carapace has resemblances in is 

 shape to so many Cyprides ami Gandona, that, without the aid of 

 other distinctive characters, it would lie vain to regard it as deter- 

 minable. 



Tho generic relations of these BiUomostraca are doubtful, except 

 in the case of the Gandona Candida; ami here we are guided merely 

 by the shape >>t' the carapace. Fig. L3, though having an analogue 

 among the Cyprides, may he a Oylhere or Cytherideis (su< h a- often 



* Jones, Monof;. Test. Entom. p. 15, pi. I. Qj 



t Mem.Geol.Surv.Gt. Brit .(Ted Isle of Wight i. I856,p 168, pL7 Bga 2A •-'•'• 



