Gray on Balea. 61 



Art. IX. On Balea, hy Mr. John Euwaud Grav. 



Only one species of this subgenus has been noticed by De 

 Ferrussac in his Synopsis, where he has placed it in a section with 

 Turbo elongatus Chemnifz, ix. 112. f. 956, which differs in having 

 the peristome thickened and reflected like the Clausiliaij but has 

 no teeth or clausium. 



Balea. Prideaux Mss. 



Testa spiralis turrita, anfractibus numerosis adpressis paulatira 

 majoribus, axe (columella) perforato : apertura sinistiali peris- 

 tomate incompleto, tenui. labio subuniplicato. 



Testa, tenui concentrice obsolete sulcata, epidermide fusca, 

 laevi. 



This subgenus forms a very distinct group in the family of the 

 Helices near Clausilia, from which it differs in the peristome 

 and want of the Clausium. 



1 . Balea fragilis. 



Testi sublineari-ovata pellucida flavescentc. 



Turbo perversus, Lin. Sys. Nat. 1240. GmeUn. Montagu 

 Test. Brit. 355. Maton Lin. Trans, viii. 181. Dorset. Cat. 51. 

 Turt. Conch. Diet. 226. Dillwyn R. S. a / - 



Pupa fragilis. Drap. Moll. ' • 



Helix perversa. Ferussac Synop. a. 511. 



Balea lucifuga. Leach Mss. 



Icon. List. An. Ang. t. 2. f. \7 ? Schroct. Einl. Conch, t. I. 

 f. 5 ? Favanne, t. G5. f. e. 4. Mont. t. 1 1. f. 12 / Trans. Lin. 

 Soc. viii. t. 5. f. 2 .' Dorset Cat. t. 19, f. 11. 



Moss at the root of trees, Europe, Great Britain, Mus, Brit. 

 Sowcrby, Nostr. 



Shell spiral, nearly linear ovate, turrited, pellucid yellowish 

 whorles many, obsoletely conccntiically furrowed, close pressed, 

 gradually enlarging : columella perforated. Mouth to the left: 

 peristome incomplete, thin, inner lip when perfect with a small 

 pleatliko tooth near the middle, axis -^^^ diameter -^ of an iucli. 



2. Balea Tristensis. 7 tK Vt , /• A 



