THK NAUTILUS. 81 



Chrysodomus tahulatus Baird. Orcas Island, common, living 

 and dead. 



Buccinum cyaneum Brug. Ellamar. 



Alectrion (Tritia) mendica Old. (Nassa mendica Gld.). Orcas 

 Island. 



Marginella (Volutella) pyriformis Cpr. Orcas Island. 



Colurabella (Nitidella) gouldi Cpr. Orcas Island. 



Amphissa corrugata Rve. Orcas Island, common. 



Bela fidicula Gld. Orcas Island, 8 specimens living. 



Natica clausa Brod. Orcas Island, Port Graham. 



Polinices (Euspira) lewisii Gld. (Lunatia lewisii Gld.). Ballard 

 Beach, common. 



Polinices pallidus Brod. «fe Sby. Orcas Island, Ellamar. 



Velutina laevigata Fleming. Orcas Island, not rare. 



Galerus fastigiatus Gld. Orcas Island, very common on stones 

 and other shells. 



Crepidula dorsata Brod. Orcas Island. 



Crepidula grandis Midd. Port Graham. 



Crepidula navicelloides Nutt. Orcas Island. 



Trichotropis cancellata Hds. Orcas Island, common. 



Tachyrynchus lacteola Cpr. (Mesalia lacteola Cpr.). Dredged 

 and on shore Orcas Island. 



Caecum hemphilli Stearns. Ellamar. 



Eulima micans Cpr. Orcas Island. 



Turbonilla (Pyrgolampros) alaskana Dall. Orcas Island. 



Turbonilla (Pyrgolampros) taylori D. & B. Ballard Beach. 

 ( To be continued.') 



ON OPEAS GOODALLI MILLER. 



BY H. A. PILSBRY. 



The species commonly called Opens goodalli is the most slender 

 «nd acuminate of the American Opeas. Its history has been given 

 in detail in the Manual of Conchology, XVIII, pp. 200-203 (1906), 

 but in common with other authors I overlooked the fact that the 

 name was preoccupied. The species will henceforth be known as 

 Opeas pumilum (Pfr.). The references may be found in full in the 

 Manual, but the following synopsis of synonyms may be useful : 



