196 BET. E. T. Lowe's list of suells 



Grroup 3. Turricula, Beck (Grenea, sp. Alb.). 

 Helix PumiliOj Chemn. 



Group 4. CcirocolUna, Beck (Gonosfoma, pars, Alb.). 

 lenticula, Fer. 



Group 5. Tachea, Leacli {Archelix, Alb.). 

 lactea. Mull. 



Gen. BuLiMus, Scop. 

 Group 1. Elisma, Leacb. 

 10. Bulimus acutus {Mull.) ; /3 unicolor, Pf. ; y, Pf. ; turricula 

 (Chemn.), 



ventrosus (Fer.). 



solitarius [Poir.). 



Group 2. Bumina, Eisso. 

 Paivse, Lowe. 



Gen. AcHATiNA, Lam. 

 Group Ferussacla, Risso. 

 Achatina foUiculus {Gron.), a abbreviata, ;8 producta. 

 15. ruricola, Lowe. 



Notes on the preceding List. 



1. Helix pisana, MiiU. ; y, Pf. (ed. 1.) i. 153 ; var. h. aJhoranensis, 

 Webb, Mousson in Hartung's Geolog. Verbiiltu. Lanzarot. und 

 Fuertav. 132. — The specimens are small, and mostly pale-coloured 

 {i. e. narrowly and faintly banded) or white ; but otherwise quite 

 of the usual globose thin-shelled Lisbon, Cadiz, Madeiran, and 

 Canarian form of the species, with the keel present only in quite 

 young examples. The perforation is in smaller shells more open 

 or distinctly marked by the raised and only partially reflected 

 pillar-lip : in larger specimens it is nearly or quite closed. The 

 mouth is usually full rose-coloured. Common in the neighbour- 

 hood of Mogador. 



2. Helix planata, Chemn. xi. 281, t. 209. ff. 2067-2069 ; Pf. 

 (ed. 1.) i, 175 (excl. syn. Webb et habit. Canaria, Lancerotta, et 

 Graciosa). Carocolla planata, Lam. (ed. 2.) viii. 148 (excl. syn. 

 Webb et Berth.). 



a. acutangula ; carina acutissima elevata usque ad labrum producta, 

 apertura ad carinam perinde valde angulata, testa depressa, spira 

 planata, anfr. planis. 



Subvar. 1. omnino cretaceo-alba, cc. Chemn. /. r. t. 20.0. ff. 2067, 2068. 



