ENTOMOSTRACA FROM CEYLON. 



341 



Physocypria tuberata, sp. n. (PI. III. fig. 22 ; text-fig. 1.) 



Female. Seen laterally the shell is oval, the greatest height 

 'equal to two-thirds the length and falling behind the middle 

 (text-fig. 1 a). The anterior end is much less broad than the 

 posterior end. The right and left shells are of the same shape, 

 the left shell slightly the larger and overlapping the right in 

 iront. Both shells have a narrow hyaline border and are fringed 



Text-fio'ure 1. 



Fhi/socypria tuberata. 



a. Female. Left valve, X 66. 



h. Male. Right valve from inside, X 126. 



c. Female. Fm-cal ramus, X 274. 



cl. Male. Copulatory oi-gan, X 274. 



e. „ Clasping organ of right side, X 274. 



'with long scattered setae. The right shell difiers from the left 

 in having a row of small knobs on the anterior and posterior 

 margins (text-fig. 1 h). Seen from above the shell is much com- 

 pressed and narrower in front than behind (PI. III. fig. 22). 

 The^surface of the shell is smooth, but marked with small brown 

 Proc. Zool. Soc— 1916, No. XXIII. 23 



