16 CHONDRINxE OF THE ALPIC CENTER. 



Var. lessinica Adarni. Elongate, brown, the aperture irreg- 

 ularly subangulate, toothless; whorls 8-10; length 8-11, diam. 

 21/0 mm. Breonio, Prov. of Verona (Pupa avenacea var. lessi- 

 nica Adami, Bull. Soc. Malac. Ital., xi, 1885, p. 222). 



"Found sporadically in many localities." From this re- 

 mark it appears to be an occasional mutation rather than a 

 race. 



Var. arcadica Reinh. Two palatal plicas, one parietal in the 

 middle, the other vanishing, upper columellar fold strong, the 

 lower deep, weak and vanishing. Otherwise strongly devel- 

 oped, resembling normal avenacea in color, striation and size, 

 6.5 to 7.5 mm. Mountain region of Kyllene, Arcadia, Greece. 

 (Torquilla avenacea var. arcadica Reinhardt, Sitzungsber. Ges. 

 naturforsch. Freunde Berlin, 1881, p. 137). 



Form tirotica West. One parietal, 2 columellar, 4 palatal 

 folds. Length 5y 2 , diam. 2y 2 mm. Vallarsa, Tyrol (Modicclla 

 avenacea var. arcadica form tirolica Westerlund, Synopsis, 

 1897, p. 97). Why considered a form of arcadica is not ap- 

 parent. 



Var. abundans West. Shell subturrite-tapering, acuminate, 

 rufescent, obsoletely, irregularly striate; whorls 8, convex, 

 especially the upper ones ; suture impressed ; aperture oblong, 

 rounded at base, the margins subparallel, outer one curved 

 above, columellar margin long, straightened, vertical ; with 8 

 teeth ; upper palatal internal, very short. Length 8, width 3y 2 

 mm. (Pupa [Modicella] avenacea var. abundans Westerlund, 

 Verh. k.-k. zool.-bot. Ges. Wien, 1902, p. 406. Pupa [Tor- 

 quilla] avenacea Brug. var. dbundans Westerlund, Nachrbl. d. 

 m. Ges.. xxvi, 1894, p. 172). Greece: Kylteni in the Morea 

 (Th. Kriiper). 



(Races having some characters of megacheilos, from the 

 Tyrol, Venetia and Alpes-Maritimes.) As I have seen only 

 riviana, I can form no opinion upon the value or synonymy of 

 these races. 



Var. avenoides West, (transiens West.). Large, strong- 

 shelled, cylindric-fusiform, very indistinctly striate, glossy, 

 reddish-brown with bluish suffusion, the spire produced ; 

 whorls S-Si/o, very convex ; aperture oblong, with nearly equal, 



