208 HELICIDJE. 



shaded below with rufous, apparent on the outer, and 

 sometimes on the second whorl, generally aids in identi- 

 fying it, though it is sometimes wanting. Young speci- 

 mens are much more depressed than those of H. Ugera, 

 and are sometimes distinctly carinated. The depression 

 of the umbilical region is not so evident in this as in the 

 preceding species. The rufous band below the white 

 band, is well defined and broad, in a single specimen 

 before me. 



50. HELIX SOLITARIA, SAY. 

 PLATE XXIV. 



H. testa crassa, orbiculato-convexa, late umbilicata, cor- 

 neo-rufescente, fasciis fuscis aut rafts cincta ; apertura cir- 

 cular! ; labro simplici ; basi unicolore. 



SYNONYMS AND EEFEEENCES. 



Helix solitaria, SAY, Journ. Acad. II. 157. 



KIETLAND, Ohio Report, 173. 



SAGEK, Michigan Catalogue, 14. 



BINNEY, Boston Journ. Nat. Hist. III. 427, pi. 24. 



CHEMNITZ, 2 ed. tab. 24, f. 5, 6. 



PFEIFFER, Symbols, II. 39 ; Monog. Helic. Viv. I. 102. 

 E'lryomphala solitaria, BECK, Index, 8. 



DESCRIPTION. 



ANIMAL. Dirty white, with a rufous tinge ; rufous 

 spots on the head and neck, lighter ones along the mar- 

 gin. Tentaculae dark; foot short, posterior extremity 

 rounded. 



SHELL. Very convex, thick, apex obtuse ; epidermis 

 varying from white to dark corneous, with revolving, 



