-WEST COAST PULMONATA. 13 



kept separate on account of its peculiar form. There was 

 no misplacing of labels or any other mistake about it. I 

 hunted near there a year without finding another. I liav^e 

 tried for many years, in various ways, to have somebody 

 interest himself regarding it." 



Specimens of the new Helicodiscus (?) (No. 23, Bali. 7, 

 367) have been supposed to be young of the above; but, 

 though resembling its inner whorls, cannot be the same 

 species. 



The discovery of fossil examples of Gonosfoimi yalesii five 

 hundred miles north of its present range suggests that 

 these sub-fossil shells of a tropical species may be re- 

 mains of a former more northern extension. 



Pomatia aspersa Mailer. 



Mr. Binney has received this shell from San Jose, Santa 

 Clara county, where it was doubtless introduced for culti- 

 vation. The same species was reported from Santa Barbara 

 in 1850, but may have been taken at the Sandwich Islands, 

 where it was introduced by sailors. (See Amer. Jour, of 

 Conch., V. 211, 1870.) 



Limax agrestis Liuu. (Bull. 7, :^67, No. 2.) 



Living specimens, collected by Mr. W. J. Raymond in 

 his garden in Oakland, were sent to Mr. Binney for com- 

 parison with those now so common in the Atlantic States, 

 where they were introduced with plants from Europe, and 

 he considers them undoubtedly that species, probably 

 brought here with roots of plants. It is thus likely to be- 

 come a pest to gardeners, like L. hewstoni. 



On the subject of the introduction of the latter, Mr. Bin- 

 ney Avas formerly doubtful, and thought it might be native, 

 as he had a similar form from Southern and Lower Califor- 

 nia. But on comparing the alcoholic specimens again, he 

 admits that they are not L. hewstoni, but either new, or 

 L. agrestis. This cannot be decided without more perfect 

 examples. 



