570 PROCEEDINGS OF THE ACADEMY OF [AugllSt; 



NOTES ON SOME HAWAIIAN ACHATINELLID5: AND ENDODONTID^. 



BY H. A. PILSBRY AND E. G. VANATTA. 



In the course of identifying various snails received from Mr. D. 

 Thaanum some new species were encountered, and the necessity of 

 several rectifications in previous classifications became apparent. 



ACH ATINELLID^ . 

 In 1900, Mr. Sykes proposed the name Kauaia to replace the preoccu- 

 pied term Carinella Pfr., based upon Amastra kauaiensis. With some 

 doubt he included several umbilicated snails in the same group. In 

 om' view, the latter may better be segregated under another sectional 

 name. The groups will stand thus : 



Genus AMASTRA Ads. 

 (Forms with the whorls carinated.) 



Section Kauaia Sykes. 



Shell oblong-conic or biconic, carinated, solid, imperforate. Axis 

 tubular though small, obliquely contracted near the base in each whorl, 

 and in the last spirally plicate, making the columella obliquely trun- 

 cated at the base. Both species are from Kauai. 



A. kauaiensis Newc. A. knudseni Baldw. 



This group stands very close to the section Amastrella. 



Section Oyclamastra nov. 



Shell turbinate, with the spire conically elevated, carinated peripher- 

 ally, thin, umhilicated; the axis a rather large tube, widening toward the 

 base in each whorl, and in the last encircled with a callous spiral cord 

 extending upon the reflexed columellar lip. Type A. cyclostoma 

 Baldw. Kauai. 



The section Amastrella seems to us to be composite, comprising 

 members of several parallel series of Amastra. The species from Maui 

 and those from Oahu should be eliminated from the group, if this view 

 is correct. 



Section Helicamastra nov. 



Shell discoidal or biconvex, carinated, the diameter greatly exceeding 

 the height, spire flattened; thin; um])ilicated, the axis a large tube. 



