PLATE XXX. 



Pleuromya (subcompressa ? var.) ltevigata (page 224). 



Figure 1. Side view of a i^erfect specimen from the south side of Alliford 

 Bay, showing the right valve. 



" 1 a. The same aspect of another and equally perfect cast from Alliford 

 Bay. 



" 1 c. Do. 



" 1 h. Dorsal view of the same specimen as the last, to show the thick- 

 ness through the valves. 



Tellina Skidegatensis (page 225). 



Figure 2. A left valve which has the whole of the test preserved. 



" 2 o. Right valve of a cast of the interior of the shell, which shews the 

 muscular impressions and pallial sinus. 



" 2 h. Side view of another left valve. 



All the specimens figured are from Bear Skin Bay, in Skidegate 

 Inlet. 



Figure 3. Right valve of a shell from the north side of Maud Island, which 

 may possibly belong to this species. 



Thetis affinis (page 226). 



Figure 4. \'ie\\- of a perfect cast of the interior of a shell of this species, from 

 Bear Skin Bay, showing the strong double intlection of the 

 pallial line. 



" 4 «. The same, as seen from above. 



" 4 h. Cast of a left valve of an ovately suljtrigonal specimen, also from 

 Bear Skin Bay. 



Prutocardium Hillanum, Sowerby, (page 228). 



Figure 5. Right valve of a small specimen from the east end of Maud Island, 

 which is supposed to be referable to this species. Slightly 

 enlarged. 



Astarte Packardi, White, (page 229). 



Figure 6. Right valve, of large size, from the east side of AUiford Bay. 

 " 6 a. Interior of the same. 

 " G h. A smaller specimen from the same locality. 



