SARSIELLA KORNICKER 



39 



Material. — Collection data on the specimens is as follows: 



Figure 17. — Sarsiella disparalis Darby, sta. 92, 9, 1-50 mm: a, medial view left valve; b, 

 medial view right valve (cross-hatching indicates area of adductor muscle attachments). 

 Caudal process right valve: c, medial view; d, lateral view. Medial view of posterior and 

 caudal process of valves: e, right valve; /, left valve. Other parts: g, margin of right 

 valve showing clusters of spines, medial view; h, 1st antenna, frontal organ and medial 

 eye; i, enlargement of spine on bristle of 1st antenna; ;', left 1st antenna. (Same scale in 

 microns : a, b; c; d-h, j; i.) 



