50 



PYRAMIDULA. 



The name Patula, as well as Eyryomphala, was intended to include 

 all of the forms referred now to the genus Pyramidula ; and most 

 recent authors have adopted Patula as the generic name. Such a 

 course is inadmissible on account of the earlier names Pyramidula, 

 Gonyodiscus and Discus of Fitzinger ; and there is, moreover, another 

 difficulty, for Patula, Delomphalus and Eyryomphala were all 

 proposed in the same year (1837), and it is now impossible to decide 

 which should be given priority. In von Martens' edition of Albers, 

 the type of Patula is said to be H. rotiuidata ; but as that species 

 was already the type of a prior group (Discus'), we cannot accept 

 .such a selection. We are, therefore, obliged to consider Held's first 

 species, H. alternata, the type. 



Species. 



P. strigosaGld. (PI. 14, f. 37-39.) 



/. depressa Ckll. 



f.fragilis Hemph. viii, 117. 



/. carnea Hemph. viii, 117. 



/. rugosa Hemph. viii, 117. 



/. albida Hemph. viii, 117. 



/. buttoni Hemph. viii, 117. 



/. globulosa Ckll. viii, 118. 

 v. jugalis Hemph. viii, 117. 

 v. subcarinata Hemph. viii, 118. 



bicolor Hemph. viii, 118. 



P. alternata Say, iii, 57. 



scabra Lam. 



strongylodes Pfr. 



infecta Parr, 

 v. fergusoni Bid. iii, 57. 

 v. mordax Shutt. iii, 57. 

 P. cumberlandiana Lea, iii, 58. 

 P. solitaria Say, iii, 58. 



kocJii Pfr. 



subrudis Pfr. 



P. idahoensis Newc. iii, 55. 

 v. newcombi Hemph. viii, 115. 



/. wasatchensis Hemph. viii, 

 [116. 

 v. binneyi Hemph. viii, 116. 



/. multicostata Hemph. viii, 116. 



/. castanea Hemph. viii, 116. 



/. albofasciata Hemph. viii, 116. 



/. gouldi Hemph. viii, 116. 

 P. strigosa Gld. viii, 117. 



lactea Hemph. viii, 118. 

 picta Hemph. viii, 118. 

 v. cooper! W. G. B. viii, 1 1 8. 

 P. haydeni Gabb. iii, 57. 

 /. hemphilli Newc. viii. 119. 

 /. gabbiana Hemph. viii, 119. 

 j. bruneri Anc. viii, 119. 

 oquirrhensis Hemph. 

 hybrida Hemph. 



parma Hemph. 



Subgenus ATLANTICA Aucey, 1887. 



Atlantica ANC., Conch. Exch. i, p. 54, April, 1887, type H. semi- 

 plicata Pfr. 



Shell small, discoidal, with wide shallow umbilicus and low-conve: 

 spire; whorls narrow, obliquely ribbed above, polished below, th( 



