THE NAUTILUS. 19 



hibernating and was not cleaned until January loth after returning 

 home. Of this lot of ten shells, six were brown with darker stripes, 

 and four were white or albino. Five of the brown shells contained 

 brown embryos of from two to three in each, the other brown shell 

 contained three brown and one white; two of the white contained 

 two brown each ; one white contained two brown and one white, and 

 the remaining white one contained two white. Whether the small 

 number in each shell of this lot tends to show that a portion of the 

 embryos may have been extruded and the remainder would have 

 been carried until the returning spring, I cannot say, or it may be 

 that this particular colony would not produce as many young, as the 

 adult shells are not more than two-thirds the size of those from most 

 of the other stations. 



At a station in Quaking Asp Canyon, Kaibab Mountains, four of 

 the shells of Oreohelix strigosa depressa were gravid, three brown 

 with dark bands and one white. One brown shell contained five 

 brown; one brown contained nine brown; the other brown shell 

 contained three brown and two white, and the white shell contained 

 five brown and two white embryos. These shells were hibernating, 

 and they were collected on October 14th and opened January loth, 

 1910. 



At twelve stations taken at random the number of young ranged 

 between five and twelve from each shell. One shell from another 

 station contained twenty embryos. All of the shells taken at these 

 thirteen stations were brown with dark bands and the embryos were 

 all brown. 



In this connection I might say that in the fall of 1907 I collected 

 in the Huachuca Mountains. The species of Oreohelix there being 

 strigosa concentrata (Dall) and strigosa huachucana (Pils.). I did 

 not see a single albino and none among the embryos. 



Query : In the light of the above notes what is to be done with 

 varieties alba and rubra among the species of snails. 



A GIANT ADMETE FROM BERING SEA. 



BY WILLIAM H. DALL. 



Among the collections made by me more than thirty-seven years 

 ago in Bering Strait and at Plover Bay on the Siberian side of the 



