AGARDHIA. 129 



distal ends trending forward, and thus not parallel to the 

 growth-lines. In the specimen figured, 1.7 mm. diam., there 

 are 6 laminae at intervals of about one-eighth of a whorl. 



The character of the surface varies in different specimens. 

 It was described by Morelet as " irregularly costulate," and 

 this term applies to some specimens; others received from 

 Morelet are nearly smooth, with only a few low riblets, 

 scarcely noticeable. As Morelet noted, the ground color 

 varies. In some shells it is a clear light gray (" corneous ") 

 tint, while others are somewhat brownish. Rarely the brown 

 spots are wanting. 



Genus AGARDHIA Gude. 



Sphyradium Hartmann, Erd- und Siisswasser-Gastrop. der 

 Schweiz, 1844, p. 53 (for S. ferrari Porro). — Reinhardt, 

 Jahrb. D. M. Ges., 1877, p. 283, type P. ferrari Not Sphyra- 

 dium Charp., 1837, see p- 1. 



Coryna Westerlund, Fauna der in der Palaearct. Reg. 

 leb. Binnenconch., iii, 1887, pp. 78, 87 (new name for Sphyra- 

 dium Hartmann not Charpentier). — Flach, Verh. phys.- 

 med. Ges. Wiirzburg, xxiv, 1890, pp. 2-7. Not Coryna Bill- 

 berg, Monographia Mylabridum, 1833, p. 73. 



Agardhia, Gude, Proc. Malac. Soc. London, ix, p. 361, new 

 name for Coryna Westerlund, type P. ferrari Porro. 



Rhytidochasma A. J. Wagner, Denkschr. math. nat. Klasse 

 k. Akad. Wissenschaften, vol. 91, 1914, p. 48, for the A. oipli- 

 cata group ; A. ferrari (Porro) here selected as type. 



The shell is rimate or narrowly umbilicate, long and eylin- 

 dric, of 6 to 9 whorls, with very obtuse summit and finely 

 rib-striate to nearly smooth surface. Aperture oblong, with 

 1 to 8 teeth (or sometimes none), margins expanded, sub- 

 parallel, the outer decidedly longer. In a young stage there 

 is sometimes a low, spiral basal fold (in A. ferrari). Ten- 

 tacles very long, without pigment spots, the animal therefore 

 blind (in A. lameUata). 



Type A. ferrari (Porro). Distribution, southern and east- 

 ern Alps and Carpathians, extending south in the Balkan 

 Peninsula as far as Albania and Philippopolis, Rumelia. 

 Living in humid places under bark or wood, deep under stones 

 or in caverns. 



