T\'EST COAST PULMONATA. 11 



WEST COAST PULMONATA ; FOSSIL AND LIVING. 



BY J. G. COOPEK, M. D. 

 (Contimied from Bull. 8, page 514.) 



C. — Introduced Species. 



Zonites CUltellatUS Thomson. (See Bull. 4, 246 ) 



Mr. J. H. Thomson, now of New Bedford, Mass., writes 

 on this species as follows: 



' ' In relation to my mistaking a specimen of H. mormonum 

 for one of Z. cnlfellatus, I had, at the time of its discovery, 

 never seen any specimen of the former, or any species found 

 in California except those around San Francisco Bay. I 

 went to the ' southern mines' in 1849, but got no land-shells^ 

 there. In 1852 I lived on San Pablo Creek, 4,| miles north 

 of Redwood Peak. I found Z. cuUeUatiis living in consider- 

 able abundance on the road from Oakland to the Redwoods, 

 in a springy little valley." This locality, as marked on a 

 map by Mr. Thomson, is 2J miles northwest of the summit 

 of Redwood Peak, at the head of a branch of Temescal 

 Creek, and on the zone of calcareous tufa mentioned in 

 Bull. 7, 373. 



"Afterwards, several squatters settled there, and began 

 raising hogs, poultry, etc. Next year I could not find any 

 shells there; the hogs had eaten them. On my second visit 

 to California, in 1854, I found the shell described by Mr . 

 Binney as H. anachoreta, and three other kinds, on the 

 east slope of the Contra Costa hills, near my house. 



I have lately received a specimen of H. mormonum var» 

 circumcarincda Stearns, and was struck with the great re- 

 semblance to my Z. cultellatus, only that this was smoother. 

 I have not seen the latter for some years, as it is in the New 

 York Museum." 



2d Ser., Vol. I. Issued Dec. 31, 1887. 



