PACIFIC COAST SPECIES. 



141 



Helix Mormonnm, Pfeiffer, Proc. Zool. Soc, 1857, 109; Mon. Ilel. Viv., iv, 276. W. G, 



BiNNEY, Ter. Moll., iv, l(i, pi. Ixxix, fig. 21 ; L. & Fr. W. Sh., i, 171 (1869).— 

 FISCHER aufl Crosse, Moll. Mex. et Gnat., 251 (1870). 



AfiJaja Moi-monnm, Tryon, Am. Jouni. Conch., ii, .314 (1867). 



Arionta Mormonum, W. G. Bixxey, Terr. Moll., v, 365. 



lu the California Ee^iou ; a species of the Sierra Nevada, not of the 

 coast. Fresno County to Khimath Lake; not at Dalles, treg.* 



The specimens received from California, which are singularly granula- 

 ted on the first one and a half apical whorls, and with the epidermis of 

 the next two or three whorls sparingly ornamented with small bat very 

 distinct raised lines or points, something like prostrate hairs, being 

 part of and same color as the epidermis, are in this respect different 

 from the usual sculpturing of the species. (See below, under circum- 

 carinata.) 



Animal uniform leaden color, darker and with a lilac tint on head 

 and tentacles. 



Jaw as usual ; 8 ribs. (Cooper.) 



Lingual membrane (Terr., Moll., Y. Plate XV, Fig. P) as usual in the 

 genus; teeth 50-1-50, with 15 laterals, the sixteenth tooth having its 

 inner cutting point bifid! 



Epiphragm as usual in the genus. 



Genitalia (Terr. Moll., V Plate XIII, Fig. E) : The general appearance 

 is that of A.Jidelis, as formerly described by me, but there is an addi- 

 tional accessory organ {a p g) of use unknown to me. 

 The organ (/•) is a dart sac. The dart is short, stout, 

 straight, swollen at its base, and with an enlarged, 

 acutely pointed apex (Plate XIII, Fig, F). Upon 

 the vagina, above the insertion of the penis sac, is a 

 ridge-like process (j-), containing in three individuals 

 examined one round and one oblong calcareous .no- 

 dule (Plate XIII, Fig. G). 



The genitalia are different from that of the other 

 ArionUv. The vaginal accessories are more like 

 those of Af/laia Jidelis and infumata. 



Figure 120 was drawn by Mr. Sowi-rby from Dr. 

 Pfeifter's type in the Cumingian collection. 



The geographical distribution of this species is 

 quitedift'erent from thatof the other species of ^nowto. -i. arcumcarinata. 

 It is found only between the Sierra Xevada and Coast Eange, whi'e 



Fig. 121. 



The species found here are Jrjlaia fidelis var. mivor. 



