PACIFIC COAST SPECIES. 



123 



Ag:Iai» iiifiiiiiata, Gould. 



Shell umbilicated, large, discoidal, biconvex, obtusely carinated at 

 the periphery, widely nmbilicated, smoky yu-,. 92* 



above, roughened with minute, oblique, 

 rasp-like irregularities, running obliquely 

 to the striae of growth, and bearing very 

 short, soft hairs in the fresh state, below 

 very black, shining and minutely granu- 

 lated; whorls 6 J, convex; aperture rhom- A.in/urnata. 

 boidal; peristome reddish, somewhat reflected at base; throat silky 

 lilac, near the peristome smoky. Diameter, 37"""; height, 20™™. 



Helix infumaia, Gould, Proc. Bost. Soc, v, 127 (1B55) ; Terr. Moll., iii, 13.— W. G. 



BiNNEY, Pac. R. R. Rep., vi, 112 (18:.7); Terr. Moll.,iv, 15, pi. Ixxix, fig. 2; 



L. & Fr.-W. Sh., i, 161 (1861).— Pkkiffer, Mon.Hel. Viv., iv, 351. 

 Aglaja infumata, Tryon, Am. Journ. Coiicb., ii, 310 (18G7j; W. G. BiNNEY, Terr. 



Moll., V, 352. 



Californian Eegion from Hnmboldt Bay to latitude 37° 30', espe- 

 cially in Marin, Alameda, Napa, and Mendocino Counties. A coast 

 species. 



The species has a thick, white, membranous epiphragm. I have 

 already (p. 122) expressed my belief of its being a variety of Jidelis. 



Jaw very arcuate, of uniform width throughout ; ends square ; an- 

 terior surface with 5-9 crowded, stout ribs, deuticulatiug 

 either margin. 



Lingual membrane (Terr. Moll., V, Plate IX, Fig. B) 

 has 45-1-45 teeth, with 16 laterals, the seventeenth tooth j^w^of a. in/wnata. 

 having its inner cutting point bifid. There are no side cusps or cut- 

 ting points on centrals and first laterals. 



Genitalia : see above, p. 122. 



The above figure not showing the rough char- 

 acter of the shell, the accompanying figure of the 

 epidermic of a fresh specimen is given, without the 

 hairs however. 



The animal is black with, bright red tubercles. 

 Young shells are sometimes found banded. It is 

 sometimes seen on branches of buckeye trees. 



Fig. 94. 



Eularjred view of surface 

 of A. infumata. 



The figure does not show the hirsute character of the epidermis. 



