210 MOLLUSCA OF BERING ISLAND. 



nitzki on Bering Island. Specimens have been submitted to Professor 

 Verrill who lias made a special study of this group and will probably 

 be reported upon by him at a later period. 



Cyliclma propinqua M. Sars. 



C. propinqua Dall, Point Barrow shells, p. 526, 1884. 



C. reinhardti MoUer, Ind. Moll. Gronl., p. 6, 1842 {proparte). 



Found in seventy-five fathoms water near Bering Island, by the Vega 

 Expedition (Aurivillius). 



^olidia papulosa (L.) Bergh. 

 Bering Island, Grebnitzki. 



Cadlina pacifica Bergh. 



C. pacifica Bergh, Sci. Ees. Expl. of Alaska, 176, pi. VII, figs. 19-20; pi. VIII, 

 figs. 7-18, May, 1879. 



Bering Island, Grebnitzki. Unalashka and Shumagin Islands, DalU 



Acanthodoris pilosa (O. F. Miill.) Bergh. 



A. jnlosa Bergh, 1. c, p. 240, pi. X, figs. 12-15; pi. XI, figs. 1-2; pi. XII; pi. 

 XIII, figs. 2-5, Jan., 1880. 



Bering Island, Grebnitzki. 



Siphonaria thersites Carpenter. 



S. thersites Cpr., 1864. Aurivillius, Vega Exp., IV, p. 374, pi. XII, figs. 19-20; 

 pi. XIII, fig. 16, 1885. 



Shores of Bering Island, Vega Expedition ; thence to Puget Sound 

 via the Aleutians and shores of the mainland, Dall. 



Tonicella submarmorea Middendorfl". 



Chiton snhmarmorcns Midd., Bull. Petersb. Acad. Sci., IV, No. 8, 1846. 



Chiton insignis Reeve, Conch. Icon. Chiton, fig. 148. 



Tonicella suhmarmorea Dall, Sci. Res. Expl. of Alaska, p. 109, pi. I, fig. 7, 1878 



Bering Island, Grebnitzki. Japan, Okhotsk Sea, Aleutians, Alaska, 

 to Washington Territory ; Middendorff and Dall, 1. c. 



Trachydermon ruber (L.) Carpenter. 



T. ruler Dall, 1. c, p. 102, pi. I, fig. 3, 1878. 



Bering Island, Grebnitzki. Northern seas generally. 



Placiphorella stiinpsom Gould. 



Chiton (Molpalia) stimpsoni Gld., Proc. B, S. Nat. Hist., VII, p. 101, 1859 ; Otia, 

 p. 118, 1862. 



Bering Island, Grebnitzki, five specimens; Hakodadi Bay, Sfinipson. 

 California (P. velata Cpr.) '? ; Chile, Lobos Islands (P. Blainrillii Brod.)! 



This species, which is identified from Gould's type, is especially inter- 

 esting. It would seem as if its real home was in the Commander and 

 Aleutian Islands. In 1874 1 dredged a single middle valve of large size 

 in twenty fathoms gravel at the Semidi Islands. This and the Bering 

 Island specimens are finely grown. 



The P. velata Cpr., type of the section, is found at Monterey, Califor- 

 nia. The P. BlainvilUi Brod. (1832) is reported from the inner Lobos 



