PLATE XXV. 



Martesia tumidifrons (page 179). 



Figure 1. Side view of the type of this species, shewing the riglit valve. 



Figure lo. The same specimen as seen from above, to shew the amount of 

 convexity of the closed valves. In outline. 



Figure 2. Side view of another specimen of tlie same species, with a consider- 

 able portion of the test preserved. 



PALi-EASTAcus (?) ORNATUS (page 183)1 



Figure 3. View of the tj pe and only specimen of this species known to the 

 writer, as seen from above. 



