248 HELICELLA. 



H. seetzeni Koch, iii, 223. H. eremophila Boiss., iii, 242. 



sabcea Boiss. cremnophila Boiss. err. typ. 



/. fasciata Mouss. v. amuniensis Mts. 



/. subinflata Mouss. H. erkellii Kob., iii, 243. . 

 /. avia West. v. discrepans Pils., viii, 177. 



H. beadlei Pils., viii, 176. H. sinaica Mart., viii, 178. 



H. psammita (B.) West. 



Section Heliomanes Moquin-Tandon, 1855. 



Heliomanes (Fer., Tab!. Syst., not used in a generic or subgeneric 

 sense) MOQ.-TAND., Hist. Nat. Moll. Fr., p. 259, and of subsequent 

 authors. Xeroampulla MONTS., Moll. Terr. Is. Adi. Sicil. 1892, p. 

 22 (for aradasii, subprofuga, pellucens, enhalia). Xerofusca MONTS. 

 /. c. (for luctuosa, benoiti, etc.). Xerolauta MONTS., t. c., p. 23 (for 

 virgata, variabilis, lauta). Xerolinda MONTS., 1. c. (for arenarum, 

 astata, euetha). Xerolceta MONTS., I. c. (for segusse, tuta, edulis, vari- 

 ata, rufolabris). Xerovaria MONTS., 1. c. (for tergestina, stroniana, 

 lineata), Xerambigua MONTS., t. c., p. 24 (for dantei). Xerolutea 

 MONTS., /. c. (for luteata, luteola, dautezi, melania). Xeromagna 

 MONTS., /. c. (for cespitum, introducta, marioniaua). Xeropicta 

 MONTS., 1. c. (for krynickii). Xerobulla MONTS., I. c. (for bollen- 

 ensis, robiniana, perroudiana). Xeromunda MONTS., t. c., p. 25 (for 

 turbinata, candiota). Xerocauta MONTS., I.e. (for cretica, cauta). 

 Xerovera MONTS., I. c. (for subrostrata, lacertarum, mauritanica, or- 

 anensis, cyclostoma, sphserita, caruanse, galloi, metabola, rusticana, 

 fraudulenta). Xerolissa MONTS., 1. c. (for acompsia, acompsiella). 



Shell with moderate or small umbilicus, conoidal or low conoidal 

 spire and rather tubular, unkeeled whorls. Surface nearly smooth ; 

 solid and chalky, whitish and often banded or striped. Aperture 

 rounded-lunar, lip acute, labiate. Type H. variabilis Drap., pi. 68, 

 fig. 20. 



Genital system (pi. 69, figs. 1, 2 H. variabilis'} : Dart sack con- 

 taining a slightly curved dart (fig. 1), and with an accessory sack ; 

 mucus glands with numerous tubes. In some forms two dart sacks 

 are developed (see also pi. 69, figs. 3, 4, 5, H. virgata'). 



This group contains the largest species of the genus. The whorls 

 are less tubular than in HeliceMa s. sir. and the spire generally 

 higher, umbilicus smaller. Some species have one, others two func- 

 tional dart sacks. The distribution is the same as that of Candidula 

 middle Europe north to England, and south to northern Africa. 



