76 THE NAUTILUS. 



little species seems to be quite distinct from any of those de- 

 scribed from the West Indies. It is quite different in shape 

 and proportions from A. bermudensisVan., which is the only 

 one that approximates it in size. 



Named after the original collector, the late Thomas Bland. 



Explanation of Plate III. 



Figs. 1, 3. Ferrissia obscura (Hald.). See NAUT., XXXIII, 

 p. 101. 



Figs. 4, 6. Ferrissia jamaicensis Walker. 

 Figs. 7, 9. Ferrissia adamsi Walker. 

 Figs. 10-12. Ferrissia blandi Walker. 



TWO NEW PLIOCENE PECTEN3 FKOM NOME, ALASKA.* 



BY WILLIAM H. BALL. 



The U. S. Geological Survey has recently received from Otto 

 Halla of Nome, some fossil shells from a subterranean Pliocene 

 beach reached by a shaft at twenty feet below the surface near 

 the Solomon River. Among these specimens were Astarte car- 

 teriana Dall, a Venericardia like alaskana Dall, but much larger 

 and heavier; fragments of a Chrysodomus, and two magnificent 

 new species of Pecten. Pecten lioicus Dall, and P. kindlei Dall, 

 both markedly peculiar forms of the subgenus Chlamys, had 

 already been obtained from these anciently uplifted and now 

 buried beaches, and doubtless when fully explored they will 

 afford many other things of interest. The characteristics of the 

 fauna indicate a warmer sea than at present exists at Nome, 

 and the species as a rule are larger and heavier than their recent 

 or Pleistocene analogues. 



PECTEN (PLAGIOCTENIUM) HALLAE n. sp. 



Right valve convex, heavy, subcircular, with subequal ears, 

 hinge-line wide and straight, the ears sculptured with rather 

 rude incremental lines; radial sculpture of the valve consisting 



* Published by permission of the Director of the U. S. Geological Survey. 



