Dr. W. Baird on new Entomostracous Crustacea. ■ 5 



racterizc the first described. Each of them give out, as usual, 

 two short appendages or fingers at its extremity, both of which 

 are strongly serrated. 



Length 1 line ; breadth ^ line. 



Hab. Yallah's Hill, Jamaica ; E. Chitty, Esq. 



4. Cypris Verreauxii, Baird. Plate I. figs. 5, 5 a. 



Carapace oval, elliptic, of a green colour, with darker patches 

 and streaks of the same hue. Ventral margin slightly sinuated 

 about the middle of its length; dorsal margin rounded. Extre- 

 mities nearly equal in size, and rounded. Surface of valves 

 smooth and shining. Internally the valves are furnished with 

 a shelf at each extremity, which, as well as the edges of the 

 valves themselves, are simply striated. The setae of the pediform 

 antennse are short, and not plumose. Caudal filaments alike, 

 both finely serrated on the edges, and sending off two short 

 appendages, which are rounded and sharp-pointed, and very 

 finely serrated. This species is considerably like the preceding, 

 but is broader and shorter ; the edges of the shelf internally are 

 merely striated, while those of Chittyensis are strongly sulcate. 

 The setee of the pediform antennse and the caudal filaments 

 differ also considerably. 



Length f line ; breadth nearly i line. 



Hab. Chili; M. Verreaux. 



5. Cypris Yallahensis, Baird. PI. I. figs. 6-6 a. 



Carapace rotundately ovoid, much swollen, narrower ante- 

 riorly, of a green colour. Ventral margin slightly sinuate at 

 about the middle of its length. Dorsal margin rounded ; greatest 

 height at about its middle. Extremities rounded. Externally 

 the surface of the carapace is hispid and strongly punctate. 



Length about ^ line; breadth about the same. 



Hab. Yallah's Hill, Jamaica; E. Chitty, Esq. 



EXPLANATION OF PLATE I. 



Fig. 1. Candona d'Urbani, on its side, magnified 8 diameters: la, the 

 same, seen from underneath, magnified 8 diameters, with natural 

 size annexed ; 1 b, internal view, magnified 8 diameters. 



Fig. 2. Cypris unispinosa, on its side, magnified 8 diameters; 2a, the 

 same, seen from underneath, magnified 8 diameters, with natural 

 size annexed ; 2 b, internal view, magnified 8 diameters. 



Fig. 3. Cypris Texasiensis, on its side, magnified 8 diameters, with natural 

 size annexed ; 3 a, the same, seen from underneath, magnified 

 8 diameters. 



Fig. 4. Cypris Chittyensis, on its side, magnified 20 diameters ; 4 a, the 

 same, seen from underneath, magnified 20 diameters, with natural 

 size annexed ; 4 b, internal view, magnified 20 diameters. 



