19]6] Brrri/: Tliire Xrir Hrlicr.t from California 111 



Type Locality. — Under loo;.s in the pine and oak woods just back 

 of Pacific Grove, Monterey Co\uity. California; S. S. Berry, April, 

 1908, seventeen specimens. 



Remarks. — A shell of this species taken by me in the summer of 

 1906 was then reported {Nautilus, vol. 22, p. 40) as P. colunMana 

 armifjera Ancey. Armigera, however, as evidenced by one of Ancey's 

 original specimens now in my po.s.session, is quite a different thing. 

 P. pinkola is well characterized by the complete absence of even traces 

 of teeth, its almost imperforate umbilicus, narrow peristome, thin 

 transparent shell, and small size. A few years since it would surely 

 have been ranked as a subspecies of P. columhiana, and such may well 

 prove its proper position, but the very large serias of western Polygyras 

 studied by me affords absolutely no intergrades, and the weight of all 

 the evidence seems to be almost wholly in favor of recognizing the dis- 

 tinctness of the two forms. Phylogenetically, pinicola undoubtedly 

 represents an extreme southern outpost of columhiana. which has been 

 in isolation long enough for the development and fixation of its own 

 special characters. 



Shells of the usual type found in the neighborhood of Santa Cruz, 

 just aero.ss Monterey Bay, are widely different, having less similarity 

 to pinicola than some of the more northern forms. 



As indicated by the given measurements, the species is remarkalily 

 constant in size, as well as in its other characters. 



Tniiinmilled December H), VJ15. 



