86 A MANUAL OF AMERICAN LAND SHELLS. 



Ri/alina Dnranfi, W. G. Binxey, L. & Fr.-W. Sli., i, 37, fig. 49 (1869). 

 MacrocycHs Duranti,'\Y. G. B., T. M., V. 94. 



A Californian Eegioii species, extending also into the Lower Califor- 

 nia Region as far south as the mouth of the San Tomas River. I have 

 received it from Santa Barbara Island, Catalina Island (Hemphill), and 

 from near San Francisco. It is a coast species. 



The specimen figured is authentic. 



Jaw as usual in the genus. Lingual membrane (Plate I, Fig. E of T. 

 M., Y). See p. SO, for description of central tooth. This species and 

 Sportdla from subgenus Hoplohienia (Ancey, Le Nat. IV. 110). 



Family LIMACID^. 



ZOIVITES. (See Ijelow.) 

 Zoiiites Whitiieyi, Newcomb. 

 Shell umbilicated, greatly depressed, thin, smooth, scarcely marked 

 Fig. 50. ])y the delicatc wrinkles, shining, smoky horn-color; spire 

 slightly elevated; whorls 4, flattened, the last planulate above 

 and below; umbilicus broad, pervious; aperture transversely 

 subcircular; peristome acute, simple. Greater diameter 5^, 

 lesser 4^'"°^; height, 2"'". 

 Z. Whitneyi. ^^^.^ jvhitrieyi, Newcomb, Proc. Cal. Acad. Nat. Sci., iii, 118 (1864).— 



PFEIFFERy Mou., V. 171 (1868). 



Patula Whiiiieyi, Tryox, Am. Joiirn. Coucli., ii, 263(1866). 



Hijalina Whitneyi, W. G. Bixney, L. & Fr.-W. Sh., i, 32, fig. 37 (1869). 



Zonites Whitneyi, W. G. B., T. M., V. 113, 432. 



Inhabits the California Region in the Sierra Nevada, near Lake Tahoe, 

 California, under damp logs and bark. 

 The specimen figured is authentic. 



There are 24-1-24 teeth on the lingual membrane, all of the type 

 usual in the genus; four of them are laterals, on either side. 

 Zonites conspectus, Bland. 

 Fig. 51. Shell umbilicate, subdepressed, thin, with oblique, rather 



distant rib-like strife, the interspaces microscoijically striate, 

 dark horn-colored; spire convex, with smooth, obtuse apex; 

 suture deep; whorls 4, convex, gradually increasing, the 

 last broader, rounded, slightly descending above; umbil- 

 icus about equal to two-sevenths the diameter of the shell ; 

 aperture oblique, roundly lunate; peristome simple, straight, 

 the margins approaching, the coluniellar margin scarcely 

 z. congpectAig, dilated. Greater diameter 2,lesser Ij^"™ ; height, l'""*. 



enlarged. 7 -t ? <=> i 



