180 THE NAUTILUS. 



Pyramidula striatella Anth. Only a very few of this species taken 

 near Missoula in June, 1897. 



Pyramidula elrodi Pils. This beautiful shell has been termed by 

 an admiring friend " the queen of the Pynimidulas." It has thus 

 far been found only along the banks of McDonald lake in the Mis- 

 sion mountains of Montana, living on the crags and among the loose 

 talus. The first collecting produced some forty specimens, all dead. 

 During the summer of 1900 about three quarts were secured. It 

 will be interesting to the reader to give some of the opinions regard- 

 ing this shell. For beauty the quotation above is certainly very 

 flattering. W. G. Binney writes, Oct. 12, 1900, "I call it a de- 

 pressed form of Hemphill's Wasatchensis. You might make a dozen 

 species out of my series, and feel like tearing your hair afterwards 

 in despair ! '' Dr. "W. H. Dall says " the shell is larger than any 

 strigosa I ever saw, and differs in sculpture from any in our collec- 

 tion. Strigosa, var. Hemphilli has the same form, but its sculpture 

 is predominantly spiral and the shell the usual size. Conchologically 

 speaking, it is a coarsely sculptured form of Stearns' shell {circum- 

 carinata)." Dr. H. A. Pilsbry considers it sufficiently different from 

 any existing species to be described as a distinct species. 



THE SHELL-BEAKING MOLLUSCA OF RHODE ISLAND. 



BY HORACE F. CARPENTER. 



[Conclusion.^ 



210. Anomia aculeata, Gmel. 



Shell small, round; beaks obtuse, terminal; surface covered with 

 fine hairy, radiating lines on the upper or convex valve; lower valve 

 thin, smooth and flat, color yellowish white or gray ; interior shin- 

 ing ; aperture circular. Length and height about one-half inch each. 



Habitat from Long Island to Greenland and northern coasts of 

 Europe, rare south of Cape Cod. It has been found at Greenport 

 and Montauk, L. I. (S. Smith); Stonington, Conn., 4 to 5 fathoms; 

 Off Gay Head, 10 fathoms, but as yet no specimens have been ob- 

 tained in R. I. waters. Its station is among roots of fuci, attached 

 to stones and shells. 



211. Anomia glabra, Verrill, 1872. 



Syn : Anomia ephippium, Gld. and American authors, non Linne. 

 Anomia elertrica, Gld. (Binney's), non Linne. Anomia squamula, 

 Gld. (young), non Linne. 



Shell rounded, oval or irregular in form ; beaks small, pointed, 

 not quite reaching the margin; substance of the shell scaly, consist- 

 ing of numerous overlapping layers of pearly material resembling 

 talc, of a greenish tinge in living specimens — this substance in dead 



