224 AMERICAN JOURNAL 



The soil contains lime enough, and there are many streams 

 running in on all sides, as well as marshy and springy grounds. 

 Even the drifted sand-hills near the city furnish several species, 

 being kept moist by the fogs. 



On the peninsula forming the west side of the bay, I recently 

 found Hyalina Breweri, Newc, the first yet seen near the coast, 

 the types being found at Lake Taho, 6100 feet above the sea, by 

 me, and in Plumas Co. by Prof. Brewer. It occurs at Point 

 Devisadero, six miles south of the city, rare, among decaying 

 trees. 



Patula Durantii has recently been found about five miles 

 west of this point on the upper part of Islais creek, among 

 rocks, as at Barbara I. It was before found by Mr. Rowell, at 

 Haywards, Alameda Co., but wrongly reported as P. Cronkhitei, 

 by Mr. Dall, in the Proc. Cal. Acad.,111, 258, 1866, and in 

 Amer. Journ. of Conch., II, 4, 329. 



This extends its range to 340 miles along the coast, which is 

 not surprising compared to that of the other small ones. 



Mae. Vancouverensis, Pseudoliyalina milium and compecta are 

 also found here, all but milium abundantly. The last two live 

 in rotten stumps among the sand hills, &c, with Pupilla Oali- 

 fornica and Triod. loricata. 



H. Calif orniensis (or perhaps a round var. of redimita only) is 

 very rare here. H. redimita common, running into Nickliniana, 

 which is a less common form. H. arrosa abundant, but smaller 

 and rougher than north and southward. H. exarata rare 

 towards the south. H. ramentosa rare, only one having been 

 found by Mr. Rowell at " 12 mile house," south of the city, but 

 abundant towards the head and east side of bay, extending 

 north to Napa Co., a range of 125 miles. The " large form " of 

 Dr. Newcomb is a hybrid with H. Bridgesii, (which I have be- 

 fore mentioned.) 



H. reticulata, Pf., seems really to be a variety of this, thicker 

 than common, so that the band appears unmargined. Both were 

 described as with 5| whorls, but 6J is not uncommon in large 

 ones. 



H. infumata has been lately found by Mr. Holden near 

 Alameda, opposite S. F., and extends thence along the coast 

 range north for 200 miles, but was not found at Humboldt Bay 

 by Mr. Rowell,* who obtained fidelis and its black variety, (often 

 subangled) at, that place. This species bears the same relation 

 to the latter, that sequoicola does to Bupetithouarsi, but instead 



* I have found H. infumata at Eureka, Humboldt Bay, and to 

 the southward, in the mixed redwood and oak forest, a few miles from 

 the beach. ' W. M. Gabb. 



