THE NAUTILUS. 91 



AMONG common '' beach-stuff" from the Florida Keys the writer 

 recently found a well-preserved sinistral specimen of Marginella 

 upicina Menke, in excellent condition. W. H. DALL. 



MR. E. W. GIFFORD of Alameda, California, while collecting on 

 the '' planted " oyster beds of San Francisco Bay last July, found 

 llyanassa obsoleta Say living in abundance. This is the first time it 

 has been reported from the coast. The drills, Urosalpinx cinereus, 

 which had previously been numerous, seemed to have all died, at 

 least none living were found. W. H. DALL. 



MESSRS. FKRRISS AND DANIKLS have just returned from a col- 

 lecting trip in Arizona. Several new and interesting species of 

 Sonorella and Ashmunella are among the spoils. Some account of the 

 expedition will be given next month. 



HELIX HORTENSIS ON BASS ISLAND, ME. While at Kennebunk- 

 port, Me., this summer, Mr. John B. Henderson discovered that Bass 

 Island at Cape Porpoise was well stocked with H. hortensis, so I 

 made a trip over there, and in about an hour collected seventy-five 

 specimens. The ground and weeds were covered with young shells, 

 but the adults were not so plentiful, as the field mice (?) are good col- 

 lectors and make a specialty of fine large shells, and when they get 

 through with them the shells are of very little use to the two-legged 

 collector. Also saw a good many Polygyra albolabris, which had 

 been eaten, but only found one alive. The specimens of Helix hor- 

 fensis show the following variations : 



Bands. No. Specimens. 



12345 19 



12345 Transparent bands, Var. arenicola MacGill. 4 



12300 Transparent bands, faint. 1 



00345 Transparent bands, faint. 1 



12345 (Two broken, almost gone). 1 



00300 Band distinct. 3 

 00300 Band faint and broken, but in most of them the 



band is more or less transparent, some also 



show traces of other transparent bands. 35 



00000 Yellow. 9 



00000 Whitish. 2 



Total 75 



