On some Indian Phyllopoda. 11 



occasion it was pointed out that 3 previously described species, 

 referred to the genus Estheria, viz., E. dahalensis Riippel, 

 E. ticinensis Crevelli, and E. compleximana Packard, were 

 undoubtedly referable to the same genus. Moreover, the 

 2 supposed South African species recorded by Baird as 

 Estheria 3Iaegidllivrmji and E. Buhidgei also evidently be- 

 long to the same genus; but, as likewise shown by the pre- 

 sent author, these 2 forms are scarcely in any degree specifically 

 distinct, and in all probability they are identical with L. si- 

 liqua. In the collection of Prof. Henderson, there are 2 ad- 

 ditional species of the present genus, each easily distinguish- 

 able from the other, as also from the South African species. 

 Both these species I regard as new to science, and they will 

 be described in detail below. 



Leptestheria noÎ3ilis, G, O. Sars, n. sp. 



(PL II.) 

 Specific Characters. — Shell of adult male much 

 compressed, seen laterally, oblong quadrangular in form, 

 greatest height exceeding half the length, dorsal margin 

 straight, horizontal, and terminating both in front and be- 

 hind in a distinct angular corner, ventral margin only very 

 slightly curved in the middle, anterior extremity subtruncate, 

 posterior somewhat obliquely expanded, umbones very slightly 

 prominent, and occurring close to the anterior extremity. 

 Valves semipellucid, of a fine light chestnut hue, somewhat 

 darker dorsally; lines of growth about 20 on each valve, 

 very sharply marked, rib-like, and placed at regular inter- 

 vals, surface between the lines finely dotted. Shell of young 

 female comparatively shorter, with the ventral margin more 

 regularly curved, lines of growth about 12 on each valve, 

 surface between the lines faintly and irregularly reticulate. 



