Dr. W. Baird on some new recent Entumostraca. 335 



Rev. Mr. Hislop. It is interesting to find two species of Cypris in 

 a recent state, that had heen already described as fossil. 



ESTHERIA HISLOPI, Baird. 



Animal. Head large, prolonged anteriorly into a beak of consi- 

 derable size, which is rounded at the extremity, and toothed on its 

 upper edge. The first three or four teeth are very distinct, they 

 then become smaller and less distinct ; they are very numerous. Eye 

 large, compound. Superior antennae or rami thick, rather short, 

 composed of two branches, each of which consists of seven articula- 

 tions only ; each articulation, close to the joint, is armed with short 

 spines, and the last two or three possess longer setae. Antennules 

 long, nearly half the length of superior antennae, rather slender, 

 composed of four joints, the last joint rather club-shaped ; all desti- 

 tute of setae. Tail large, armed with seven or eight pairs of strong, 

 slightly curved hooks ; the first pair are long, serrated on the edges ; 

 the second pair, near the root, armed with about ten rather stout 

 spines. Mandibles strong, fleshy. 



Shell. Carapace nearly orbicular ; umbo prominent ; margins 

 quite round. Altogether the shell very closely resembles that of 

 the genus Artemis or Dosinia amongst the Mollusca. Shell sur- 

 rounded with six or seven concentric ridges ; the surface between 

 them, when magnified, is seen to be pitted or marked with very 

 numerous, small, close-set dots or punctures. When dry, it is of a 

 clear, polished, shining appearance. 



Hab. Freshwater pools at Nagpur (Rev. S. Hislop). Mus. Brit. 



CYPRIS SUBGLOBOSA, Sow. 



The shell is of a green colour ; and the surface is strongly punc- 

 tured, the pattern resembling the depressed punctures of a thimble. 

 The anterior extremity is somewhat broader than the posterior, and 

 when seen from the inside appears as it were double, the external edge 

 of the carapace being produced beyond the true margin of the shell. 

 The lateral portion of the carapace is very prominently swollen or 

 gibbous. The dorsal margin is convex ; the ventral is concave and 

 siuuated. 



Hab. Freshwater pools at Nagpur (Rev. S. Hislop). Mus. Brit. 



This species appears to be identical with C. subglobosa of Sowerby, 

 which was found by my old friend the late John Grant Malcolmson, 

 Esq., in the district of the Sichel Hills, the geology of which he 

 has described at length in the fifth volume of the Transactions of the 

 Geological Society, 2nd series. It was described shortly by Mr. J. 

 de C. Sowerby at the end of Malcolmson' s paper, in these words : 

 " Subglobose, triangular, inflated ; front concave ; outer surface is 

 punctured." It was found in grey chert, with a species of Unio ({/. 

 deccanensis), &c., and in indurated clay with Gyrgonites, Paludince y 

 PhyscBy and Lymncei. 



CYPRIS CYLINDRICA, Sow. 



The shell is of a green colour, somewhat mottled. It is cylindrical 

 in shape ; the anterior margin rounded ; dorsal margin slightly con- 



