262 ABIDA. 



Genus ABIDA Leach. 



Pupa DRAP. and of most authors, not of Bolten 1798. 

 Cochlodonta FER., in part. Chondrus CUVIER, in part, Regne 

 Animal, ii, 1816, p. 408. HARTMANN, in part, System der 

 Erd- und Siisswasser-Conchyl. Europas, 1821, pp. 38, 50, etc. 



Torquilla STUDER, in Kurzes Verzeichniss der bis jetzt in 

 unsern Vaterlande entdeckten Conchylien, Naturwissenschaft- 

 licher Anzeiger der allgemeinen Schweizerischen Ges. f. 

 gesammten Naturwissenschaften, 3ter Jahrg., 1 May, 1820, p. 

 89, for variabilis Drap., secale Dr., avena Dr., hordeum Stud, 

 and granumCt) Drap. Not Torquilla Brisson, 1760 (Aves). 

 GRAY, P. Z. S., 1847, p. 176, Pupa secale selected as type. 



Abida LEACH, in Turton's Manual of Land and Fresh- 

 water Shells of the British Islands, 1831, p. 101, monotype 

 Abida secale Leach = Pupa secale Drap. 



Granaria HELD, Isis, 1837, p. 918 ; Pupa variabilis Dr. here 

 selected as type. Pupella SWAINSON, Malacology, 1840, p. 

 334 ; P. variabilis Dr. here selected as type. 



Stomodonta MERMET, Hist, des moll. terr. et fluv. viv. dans 

 les Pyrenees-Occidentales, 1843, p. 45. Stomodonta secale 

 (Pupa secale Drap.) is here selected as type. 



Jaminia Leach MS., Risso, in part, Hist. Nat. Eur. Merid., 

 iv, 1826, p. 88, and of some subsequent authors ; not Jaminia 

 as restricted by Gray, P. Z. S., 1847, p. 176, to the type J. 

 heterostropha Bulimus quadridem Brug. 



The shell is relatively large (5 to 20 mm. long), cylindric 

 with conic summit, pale brown, of calcareous texture, the 

 aperture having long angular, parietal and columellar lamel- 

 lae, upper, lower and basal plicae, and usually some accessory 

 folds, the plicae long, entering to or past the dorsal side; in- 

 ternal axis slender. 



Radula having unicuspid or tricuspid central teeth, the 

 laterals all distinctly bicuspid, with wide, square basal-plates ; 

 marginal teeth with additional cusps. 



Type : A. secale. Distribution : Spain to Roumania, north 

 to the Thames counties of England (possibly in Algeria also) . 



This genus differs from Chondrina by the more earthy shell 

 and longer palatal plicae, which frequently are enlarged at 



