664 REPORT OF COMMISSIONER OF FJSH AND FISHERIES. [162] 



Plate XXXI. 



Fig. 136. Diplodonta iurgida V. & S. Interior viewof left valve of another specimen, 



enlarged one and one-half diameters. i 



Fig. 137. Yoldia tlwaciformis. Side view of the sliell and living animal in expansion, d 



two-thirds natnral size. 

 Fig. 138. The san^e. Ventral view of the shell and living animal, two-thirds natural 



size, ; 



Fig. 139. Yoldia sajjoUUa. Side view of the shell and living animal in full expansion, 



one and one-half times natural size. 

 Fig. 140. Leda acuta. Interior of left valve, enlarged four diameters. 

 Fig. 141. Pecten v'ltreus, natual size. 

 Fig. 142. Pecien jmstulosits V. One of the tj'pe specimens, enlarged two diainelers; 



a, lower valve ; h, upper valve of the same specimen. 

 Fig. 144. Culeolus Tanneri V. Side view of one of the type specimens, natural size; 



a, front view of the same specimen. 

 Fig. 145. The same. Side view of another type specimen, natural size ; h, posterior ^ 



view of the same specimen. M 



Figs. 144 and 145 were drawn from specimens preserved a short time iu ' 



alcohol. 



