OF CONCHOLOGY 343 



8. Helix arrosa, Gould, 



This species has been traced south as far as Santa Cruz, on the 

 Bay of Monterey. In size it is nearly or quite equal to either of 

 those previously named, and is found varying in color, from a 

 uniform pale lemon, without a band, to a sepia, mixed with fine 

 veins of yellow, with a dark amber band cutting the body 

 whorl. The succession of these species from North to South, 

 in the order which they are given here, will be noted, and we 

 have yet to learn the slightest interference with each other's 

 territorial rights. 



4. Helix Townsendiana, Lea. 



Oregon. Locality, so far as known, quite limited. 



5. Helix Nickliniana, Lea. 



Coast Range from Klamath Co. to Santa Cruz. 

 This species offers several varieties to the collector, the 

 principal of which are included in the following : — 



a. Of double normal size, with open umbilicus. 



b. Of normal size, umbilicus open. 



c. Without band, umbilicus closed, not malleated; lip 

 broadly expanded. 



d. Surface finely granulate, granules arranged in zig-zag 

 patterns; umbilicus nearly closed; lip white and heavy. 



The two first named varieties are found in Santa Cruz Co.; 

 var. c. in Klamath Co.; var. d. in Alvarado, Alamedo Co. 

 This last, under less favorable circumstances than in marshy 

 places, is less solid in development, and equals II. redemita, 

 W. G. Binney. 



6. H. Californiensis, Lea. 



This species is of rare occurrence, a few specimens only 

 having been obtained near San Francisco, and by Mr. Yoy, in 

 Klamath Co. No opportunity for an examination of the ani- 

 mal has yet occurred. It is quite distinct in form from H, 

 Nickliniana. Reeve gives this shell in Con. Icon,, No. 660, 

 under the name of H. vincta, Valen, and in the following figure 

 gives H. Nickliniana^ Lea, under the name of H. Californiensis 



7. H. Dupetithouarsii, Desh. 



This species has not been met with along the coast north of 

 Monterey, and, excepting a few do^iMful, dead specimens from 

 Calavaras Co., seems to be confined to Cypress Point, situated 

 on the Bay of Monterey. Notwithstanding statements that it 

 has been found in Oregon, and that it has received the name 

 of Oregonensis, given by Mr. Lea, we are compelled to limit 

 the species to the localities named above. 



