HELIX. 123 



labiate, dark In-own, its extremities connected by a callus of the 

 same color; columella straight, flattened, callous within. 



Diam. 20-25 mill. 



Western, J/>V<//V, nmJ X<>rtli< ru ilm-ope. 



The synonymy includes H. ci/n-ta. If. ijniinjnrj'a.-o-lata, Sliepp., //. 

 etrusca, Ziegl, If. 'unp> rfecta and H. olivacea, Risso, H. turturum, 

 Stew. 



lu the arrangement of bands this form, like all species of Tuchea, 

 is interminably varied. 



Var. CONOIDEA, Clessin. 



Spire conoid, elevated. Diam. 22, alt l<s mill. Bavaria. 



Var. EEJAVECI, Kobelt, PL 35, fig. UN. 



Broadly two banded, the bands broken into streaks in the direc- 

 tion of the stria?. Gorz. 



Var. LUCIFUGA, Ziegi. 



Large, solid, thick shelled. Diam. 30 mill. Italy. 



Synonyms': var. appcun'ni<i. Stab., H. genueiixi*, Porro. 



Varieties albolabiata and roseolabiata are sufficiently described by 

 their names. Var. libel/tila, Risso is diaphanous, gTeen, peristome 

 reddish yiolet. Var. crcticula. Morch, is a large heavy form of 30 

 mill, diam., from Sweden. Var. porrecta, Westerhmd from Sweden, 

 in which the suture does not descend at aperture; etc., etc. 



H. HORTENSIS, Miiller. PI. 35, figs. 99, 1. 



Similar in form to H. iicnwralix; somewhat smaller ; peristome 

 white, its ends connected by a light white callus on parietal wall ; 

 bands five, subject to the same mutations as those of H. neHiomli*. 



Northern and Centra/ Etn-ojx , Westward to Pyrenees; introduced 

 into Eastern U. S. and ('anai/n. 



H. ludovidana d'Aumont, and H. subglobosa, Biuu. are synonyms. 

 Var. TROCHOIDEA, Clessiu. Diam. 19, alt 17 mill. 

 Var. PERFORATA, AVesterlund. 



Yellow, five fasciate, deeply perforate. Gotfai/tl. 



Var. ARENICOLA, JMacq. 



Tliin pellucid, pale yellow, white banded. Scotland. 



