Achalinella and oilier Pahnonata. 349 



Though we retain the species in the genns Pupa it must be remembered 

 that as treated by Pfeifl'er it would be placed in Bnliminus of Albers and 

 Martens. In general form of shell it certainly approaches Bnliminus 

 montanus. Drap. 



l.ini'ax I5ef»'Stoili, J. G. Coop. 



San Francisco, received from Mr. Steams. We presume 

 the specimens belong to this species. 



Jaw and lingual membrane as usual in the genus. No bifurcation to the 

 marginal teeth. Teeth about 30-1-30, with fourteen perfect laterals. 



The teeth are quite of the shape of those figured on p. 59 of our " L. and 

 F. W. Shells." The side cusps of the centrals and laterals are Avell devel- 

 oped. 



Erinna IWe^vcombi, A. Ads. 



In the collection of the late Mr. Kobert Swift, presented 

 by his danofhter, Mrs. A. L. Washlmrne, to the Academy of 

 Natural Sciences of Philadelphia, but temporarily in the 

 charjre of Bland, he found specimens of this species, given 

 to Mr. Swift by Dr. Wesley Newcomb. 



The genus Erinna, referred to the famil}'^ Limnceidoe, was 

 described by H. and A. Adams, in the Zool. Proc, 1855. 



The authors remark, "This shell (E. jSTeivcomh)') by some 

 would be referred to JVf^rUina, by others to Limnoea, and 

 possibly by a few to the genus Olina ; it appear>, however, 

 to be distinct in character from all these." 



From one of the specimens in the Swift collection the jaw 

 and linjrual membrane here described were obtained. 



To satisfy himself as to the shells, Bland sent one for ex- 

 amination to Dr. Newcomb, who in reply has kindly furnished 

 the following information as to the habitat and station of the 

 species : — 



"The specimens were forwarded by me to Mr. Swift in 

 about 1852 or 1853. They were collected high up the stream 

 called the Hanelei River, on the Island of Kauai. At a fall 

 in this river, the spray is thrown over the rocks, keeping 

 them constantly wet ; from these rocks the shells were taken. 



