PLATE XVI. 



Fig. 3. Eight side of Triposolenia depressa sp. iiov. X 506. 



Fig. 4. Dorsal view of the same. X 506. 



Fig. 5. Eight side of T. truncata sp. nov. X 506. 



Fig. 6. Anterior part of T. bicornis. X 1200. 



ABBEEVIATIONS. 



a.l. — anterior list. 



d.a.h. — dorsal antapical horn. 



f.p. — flagellar pore. 



/(. — neck. 



p.l. — posterior list. 



/;-./'. — transverse furrow. 

 tr.fl. — transverse flagellinn. 

 .s.sp. — suture spine. 

 v.a.h. — ventral antapical horn. 



1114] 



