162 



LAND AND FRESH-WATER SHELLS OF N. A. [PART I. 



Fig. 279. 



Helix infiineata, Gould.'— Shell umbilicatecl, large, discoidal, bi- 

 convexj obtusely carinated at the periphery, widely umbilicated, smoky 



above, roughened with miuute, oblique, 

 rasp-like irregularities, be]ow very 

 black, shining and minutely granu- 

 lated ; whirls six and a half, convex ; 

 aperture rhomboidal ; peristome red- 

 dish, somewhat reflected at base ; 

 throat silky-lilac, near the peristome 

 smoky. 'Diam. 37, height 20 mill. 



Helix infumata. ^«^'^ wfumata, GocLD, Proc. Bost. 



See. V, 127 (1855) ; Terr. Moll. 



III, 13.— W. Ct. Binxey, Pac. R. R. Rep. VI, 112 (1S57) ; Terr. Moll. 



IV, 15, pi. Ixxix, f. 2.— Pfeiffer, Mon. Hel. Viv. IV, 351. 



Aglaja infumata, Tryox, Am. Journ. Conch. II, 310, pi. 

 Fig- 280. V, f. 6 (1867). 



California, from Humboldt's Bay to San Pablo 

 Bay. 



Jaw very arcuate, of uniform width throughout ; 

 ends square ; anterior surface with crowded, stout 

 ribs, denticulating either margin. 



Jaw of 

 Helix infumata. 



' The last whirl is covered with very short, thickly-studded soft hairs. 

 (^Newcomh.) 



