44 PYRAMIDULA. 



smooth apex. Whorls tubular, obliquely striated. Aperture round 

 or nearly so ; lip simple. Type H. rupestris Dr., pi. 10, figs. 15, 16. 



Jaw arcuate, finely striated vertically. 



Radula having the central teeth unicuspid, the side cusps being 

 represented by a slight sinuation. Laterals bicuspid. Marginals 

 with low wide basal-plate, the inner bearing two cusps, the outer 

 becoming multicuspid by splitting of the cusps, (pi. 11, fig. 25, P. 

 rupestris Dr.) 



Distribution, Europe and Central Asia. 



This section differs from Gonyodiscus and Patulastra in having the 

 spire conically elevated, and from the former in lacking rib-strise. 

 P. rupestris Dr. iii, 51. f. dalmatina Cl. 



umbilicata Mont. f. pinii Ad. iii, 51. 



aliena Zieg. P. chorismenostoma Bl. & West. 



spirula Villa. P. hierosolymitana Bgt. iii, 52. 



myrmecidis Scac. P. humilis Hutt. iii, 22. 



f. rupicola Stab. P. orphan a Hde. 



f. saxatilis Hm. P. euomphalus Blf. iii, 32. 



f. subglobosa Bgt. P. abbadiana Bgt. iii, 52. 



f. conoidea Bgt. P. brucei Jick. iii, 52. 



f. meridionalis Iss. P. amblygona Reinh. iii, 52. 



f. jsenensis Cl. iii, 51. P. lepta West, viii, 81. 



Section Patulastra Pfeiffer, 1878. 



Patulastra PFR., Nomencl. Hel. Viv., p. 87. 



Shell having the form of Patula, but minute, with fewer whorls, 

 the surface unicolored, with or without riblets. 



This section may be retained to include the minute forms similar 

 in general characters of the shell to Punctum, but with the anatom- 

 ical features of the genus Pyramidula. The limits of the group are 

 uncertain, as part of the species might be placed in the sections 

 Gonyodiscus or Pyramidula, and others are likely to prove Punc- 

 tums. Of course the melange included here by Pfeifier and by 

 Tryon must be assorted into many diverse groups. 

 P. abyssinica Jick. iii, 32. P. debeauxiana Bgt. iii, 28. 



rivularis Mts. P. carotae Bgt. Serv. iii, 31. 



P. aranea Parr, iii, 31. P. elachia Bgt. iii, 28. 



P. aucapitainiana Bgt. iii, 29. P. galla3ciana Silv. 

 P. balatonica Serv. iii, 31. J P. henriquesi Silv. 



P. bussacona Silv. P. lederi Bttg, iii, 31. 



