64 GASTROCOPTA. 



Gastrocopta gemenidens (Pils.). Vol. 24, p. 228; vol. 27, 

 p. 202. 



A new section, Geminidens Pilsbry, 1930, was proposed for 

 Gastrocopta geminidens (Pils.) in Proc. A. N. S. Phila, 1930, 

 p. 351 (Dec. 13). It is characterized by the microscopically 

 granulose surface of the conic shell of few whorls, and 

 apertural dentition of Gastrocopta, the palatal folds not 

 immersed. 



Gastrocopta pilsbryana (Sterki). Vol. 24, p. 36. 



Pupilla stoneri Chamberlin and Jones (Bull. Univ. Utah, 

 xix, No. 4, June, 1929, A Descriptive Catalog of the 

 Mollusca of Utah, p. 83, fig. 32), of which I have examined the 

 holotype (PI. 15, fig. 3) through the courtesy of Professor 

 Chamberlin, is in all respects a typical G. pilshryaiia. The 

 type is a fresh specimen, spermaceti-wliitish, showing the 

 pinkish dried animal faintly through the shell. It measures 

 1.7 mm. long, 0.8 wide above the aperture; 5 whorls. It is 

 from Cedar Canyon about 10 miles from the mouth, east of 

 Cedar City, Utah. 



The pale color of this specimen is not due to weathering, as 

 supposed to the authors, but is proper to the species. The 

 ' ' fourth fold, back of the parietal tooth ' ' which they mention, 

 was evidently an effect of light, as there is no tooth in that 

 position. 



The several forms described as paratypes by Chamberlin 

 and Jones are partly not conspecific. One sent me is Vertigo 

 coloradensis arizonensis P. & V. (No. 150656 A. N. S. P.). 



GiS^TROCOPTA PAZi (Hidalgo). PI. 18, fig. 1. 



Vol, 24, p. 102. The localities "Guayaquil" and "Panama" 

 are to be deleted. Also delete the phrase in the description 

 "or joined at the base and appearing like a bifid tooth". 



Florentino Azpeitia Moros has discussed this species fuUy 

 in Revista Real Acad, de Ciencias de Madrid, vol. 22, 1925, p. 

 177-180, and has given a figure (p. 178, fig. 8) of an Amancaez 

 (Ecuador) topotype, which is reproduced in our PI. 18, fig. 1. 



