1886.] PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 209 



CONTRIBUTIONS TO THE NATURAL HISTORY OF THE COM- 

 MANDER ISLANDS. 



No. 6. — Report on Bering Island Mollusca collected by Mr. Nicholas 



Grebnitzki. 



Bt TV. B. DAXIi. 



The interesting collection of shells obtained by Dr. Stejnejjer (these 

 proceedings Yol. VII, 1884, pp. 340-349) has recently been supplemented 

 by another made by Mr. Nicholas Grebnitzki, Eussiau governor of the 

 Commander Islands, which has been sent to the U. S. jll'I'atioual Museum 

 with the understanding that it was to be reported upon. Though small, 

 it contains several additions to the first list, some of which are of much 

 interest, and the enumeration of these gives me an oijportunity of incor- 

 porating some remarks and additional notes on the species collected by 

 Dr. Stejneger. 



Beside the species collected at Bering Island, Mr. Grebnitzki had the 

 kindness to include the following species from Petropavlovsk, Kam- 

 chatka, dredged in Avatcha Bay : Acanthodoris pilosa (O. F. Miill.) 

 Bergh, white and purplish varieties; Lacuna vincta Montagu ; Litorina 

 grandis Middendorff, young specimens ; Margarita ohscura Coutliouy ; 

 Margarita oUvacea Brown aud'vur. gigantea Leche; Trophon multicos- 

 tatus Eschscholtz ; and a Bela, closely allied to or identical with B. 

 turricula. 



In order to make the paper more useful I have added the species re- 

 ferred to Bering Island by Dr. Leche and Mr. C. Aurivillius, in their 

 publications on the marine acephala and gastropoda of the Vega Expedi- 

 tion and included in the final list all those collected by Stejneger so as 

 to make as nearly as possible a complete list of the knowij marine 

 mollusk fauna of Bering Island. This adds about eighty per cent of 

 species to the original list. I am under the impression that the enumera- 

 tion of the land and fresh-water species in the Stejneger report was 

 sufficiently accurate for all purposes to which it is likely to be applied, 

 though Dr. Westerlund is unable to accept one of my determinations. 

 It is possible that I may have been in error as to the identity of H. floc- 

 ciila Mor. with the immature H. pauper Gld., which should probably be 

 referred to H. 7'uderata Studer. 



List of species. 



Lestoteuthis fabricii (Licht.) Verrill? 



L.fabricii Verrill, N. Am. Cepli., 390, 1881. 



fOnychoteuthis kamtscliatica Midd., Mai. Ross, II, p. 186, pi. XII, figs. 1-6, 1849. 



Young specimens according pretty well with the description of Mid- 

 dendorf, but to a cursory examination not showing traces of the large 

 hooks on the clavulae of the tentacular arms, were obtained by Greb- 

 Proc. K M. 86 14 Octtobcr 11,1886. 



