158 BULLETIN OF THE 
Arionta Townsendiana, Lea. (p. 355.) 
The variety ptychophora is sometimes very thin.and smooth, not malleated. 
I have it from Salmon River, Idaho ; Bitter Root Mountains; Dalles, Ore- 
gon; Umatilla Co., Oregon. (Hemphill.) (See Pl. IV. Fig. E, F.) 
Arionta tudiculata, Binney. (p. 357.) 
In the Sierra Nevada from San Diego it ranges 450 miles north. J. G. 
Cooper says this and A. Mormonum are the only large species found east of the 
coast range. 
Dr. Cooper mentions a variety, Franki, in Amer. Journ. Conch., V. 209. In 
letters to me, however, he says this is a misprint for Trask. 
Arionta Ayersiana, Newcoms. (p. 359.) 
San Clemente Island. (Yates.) 
Arionta intercisa, W. G. Binney. (p. 360.) 
Plate I. Fig. I. 
Mr. Henry Hemphill has lately sent me alcoholic specimens, collected by 
him at San Clemente Island, California. 
The jaw is as usual in the genus, with six separated ribs. 
The lingual membrane is as usual in the genus. Teeth 31-1-31, with about 
15 laterals on each side. The extreme laterals only are bicuspid. (PI. I. 
Fig. I.) 
The genitalia are like those figured by me for Huparypha Tryoni. (See Terr. 
Moll., V.) 
From the series of specimens sent by Mr. Hemphill, I am inclined to believe 
Arionta redimita to be a variety of intercisa. The original specimen may have 
come from the same locality. Formerly I suspected redimita to be a variety of 
ramentosa. 
Arionta Mormonum, Preirrer. (p. 366.) 
Pil. I. Fig. K. 
The small form from Dalles, Oregon, is probably a small variety of Aglaia 
Jidelis. Sonora, Mexico, is given as a locality of this species, from confounding 
the town Sonora of Tuolumne Co., California, with the Mexican state. Mor- 
mon Island is a rocky islet in the American River, seventy miles north-north- 
west of this town of Sonora. 
A variety is indicated as circumcarinata by Stearns (Ann. N. Y. Acad. 
Sci.,. Vol. 7. p- , Fig., 1879). A copy of two of his figures is given on 
Plate I. Fig. K. It is thus described by him : — 
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