30 THE NAUTILUS. 



of 148 species, four of which, Odostomia cookeana Bartsch, Alvania 

 bakeri Bartsch, Onoba asser Bartsch and Leptogyra alaskana Bartsch, 

 are new. It is an unfortunate fact that of each of these new species 

 except the Leptogyra, I secured only a single specimen, and of the 

 Leptogyra I found only half a dozen. 



List of Shells Collected. 



In the following list the species marked Orcas Island were dredged 

 near Orcas Island, Puget Sound, at depths varying from 10 to 30 

 fathoms. All other points mentioned are in Alaska except Ballard 

 Beach, a point on the Sound just north of Seattle, Washington, and 

 Sucia Island, a small island north of Orcas. 



Purpura foliata Mart. (Cerostoma foliatum Mart.). Orcas Island, 

 living and dead, rather common. 



Tritonalia lurida Midd. (Ocinebra lurida Midd.). Orcas Island, 

 dead, not common. 



Tritonalia subangulata Stearns (Ocinebra subangulata Stearns = 

 Tritonalia michaeli Ford. Orcas Island, a single young specimen, 

 living. 



Boreotrophon multicostatus Esch. Orcas Island, two living 

 specimens. 



Boreotrophon orpheus Gld. Orcas Island, two specimens. 



Boreotrophon tenuisculptus Cpr. Orcas Island, 1 specimen ; Port 

 Graham, Alaska, 1 specimen. 



Thais (Nucella) decemcostata Midd. (Purpura decemcostata 

 Midd.). Orcas Island ; Ballard Beach ; Seward, Alaska. 



Thais (Nucella) lamellosa Gmel. (Purpura lamellosa Gmel.). 

 Common at all points visited. 



Thais (Nucella) lima Mart. (Purpura lima Mart.). Ellamar; 

 Seward ; Port Graham. 



Thais (Nucella) saxicola Val. (Purpura saxicola Val.). Ellamar. 



Thais (Nucella) saxicola emarginata Desh. (Purpura saxicola 

 emarginata Desh.). Ellamar. 



Thais (Nucella) saxieola ostrina Gld. (Purpura saxicola ostrina 

 Gld.). Sucia Island, Puget Sound. 



Argobuccinum (Priene) oregonense Redf. (Triton [Priene] ore- 

 gonense Redf.). Orcas Island ; Port Graham. 



Chrysodomus liratus Mart. Port Graham, 4 large specimens 

 living. 



