84 J. F. WHITEAVES ON THE 
INOCERAMUS QUATSINOENSIS, Sp. Nov. 

Fic. 3. INOCERAMUS QUATSINOENSIS. 
Shell nearly equivalve, both valves being very convex; general outline obliquely 
subovate, the height being somewhat greater than the length. Hinge line short, less than 
one-half the greatest length of the valves, straight and forming nearly a right angle with 
the upper part of the anterior margin, Anterior border slightly concave above and gently 
concave below the middle ; posterior margin broadly rounded, forming an obtusely sub- 
angular junction with the hinge line above and rounding into the ventral margin in a 
somewhat regular semi-ovate curve. Beaks depressed, incurved and somewhat recurved, 
anterior, terminal and D 
Surface marked with well defined, roa: concentric plications. 
Height, three inches and a quarter; maximum length, not quite two inches and 
three quarters. 
Forward Inlet, Quatsino Sound. One tolerably perfect cast nine a fragment of 
another. 
The outline of this shell is almost precisely similar to that of the I. Neocomiensis of 
D'Orbigny, from the French Neocomian, and it is possible that both may prove to be ex- 
treme forms of one species. But, on the other hand, the French shell is much smaller than 
the one just described, and the sculpture of the former is described as consisting of com- 
paratively fine striæ of growth, rather than broad, concentric undulations or plications. 
AUCELLA Piocuu, Gabb. 
Exceedingly abundant at Tatlayoco Lake and Forward Inlet, and not uncommon on 
the banks of the Upper Skagit. A study of more than one hundred examples of this 
