252 



HELICELLA. 



Shell much depressed and broadly umbilicated, with smoothish, 

 tubular whorls, rounded at periphery, and of the usual chalky text- 

 ure and white, banded coloring. Aperture small, round or oval; 

 but little modified by the preceding whorl, the lip slightly expanded 

 Type H. ericetorum Mull., pi. 68, figs. 21, 22. * 



Jaw arched, strongly ribbed. Genital system (pi. 69, figs. 6, 7, 

 8, H. ericetorum) with short swollen penis, long epiphallus upon 

 which the retractor is inserted, and very short flagellum. High on 

 vagina are two symmetrically placed dart sacks (fig. 7), contain- 

 ing well curved round darts, provided toward the end with two nar- 

 row blades (fig. 8). Mucus glands numerous. 



H. aberrans Mouss., iii, 246. 

 H. ammonis Schm., iii, 245. 



/. Candida Porro. 

 v. sclerostoma Stef. 

 v. bononiensis Stef. 

 v. bonaldi Ad. 

 H. apollinis Mts. 

 H. bathytera Bl. & W. 



f. affinis Bl. 

 H. bathyteropsis Serv. 

 H. enhalia Bgt., iii, 243. 

 H. ericetella Jouss., iii, 243. 

 H. ericetorum Mull., iii, 245. 

 trochlearis Andrz. 

 kusteri Held. 

 ? ita la L. media Gm. 

 dubia Hartrn. 

 /. devians West. 

 erica DaC. 

 obliterata Hartm. 

 /. tardyi Bgt. 

 H. gyroides Parr., iii, 246. 

 H. instabilis Zieg., iii, 248. 

 neopolitanaAndr. 

 spadce Calc. 

 nubila Charp. 

 ocellus Villa. 



Insufficiently known or unfigured species : H. virgultorum Bgt., 

 morbihana Bgt., fagoti West., dysmica West., synerosa Serv., sal- 



v. nubigena Charp. vi, 84. 



v. bathyomphala Charp. 



v. destituta Charp. 



v. discrepant Tib. . 



v. grseca Mart. 



? iphigenice Deb. 

 H. interpres West., iii, 242. 

 H. lemoinei Deb., iii, 246. 

 H. neglecta Drap., iii, 243. 

 clivorum Hartm. 

 varians Risso. 

 H. obvia Mke. 



candicans Auct., iii, 244. 



v. arenosa Z., Rm. 



v. dejecta Z., Rm., iii, 246. 



v, renoufi Serv. 



v. pullula Parr. 



v. dobrudschse Parr. 



v. grseca Mts. 



H. pamplonensis Schm., iii, 246. 

 H. spirula Zel., iii, 249. 



v. bakowskyana Cl., iii, 248. 

 H. talmacensis Biz. 

 H. vukotinovici Hire., iii, 246. 



liburnica Stoss. 

 H. vulgarissima Mouss., iii, 245. 



