OF CONCHOLOGY. 215 



row is "immediately behind the parietal tooth, and visible through 

 the shell just within the aperture." Others may be found unfinished, 

 showing whether the internal teeth are labial at any stage of 

 growth, and if they ever come opposite the parietals. 



Its far northern habitat, and station in damp moss under for- 

 ests, indicate that the animal will be found to differ enough, at 

 least, to put it in a peculiar subgenus. 



ZuA SUBCYLINDRACEA, Chem. {lubricci, Mull.) 



Was found by Harford in Alaska. Found in Ohio, etc. 



Leucocheila ? 



Mr. Voy informs me that on the summit of the coast range, 

 near lat. 41°, where he discovered 3Iac. Voyana, he obtained a 

 number of specimens of Pupa-like shells which resembled the 

 eastern L. fallax, but unfortunately lost them all while travel- 

 ing. This year, Mr. Samuel Beannan, Jr., has found a single 

 bleached subfossil specimen very near San Francisco, more like 

 L. fallax than L. Arizonensis or hordacea (the only species yet 

 found west of the Rocky Mountains), but probably distinct. 



A ^'Pupa, sp. indet. jun.," was found at Lake Osoyoos, lat. 

 49°, Wash. Terr., by J. K. Lord, of the Brit. N. W. Boundary 

 Survey (see Carpenter, Brit. Assoc. Rep. 1863, p. 606). This 

 far northern shell may possibly prove the same with Voy's sub- 

 alpine specimens, if not with the fossil from this vicinity. 



Vertigo corpulentus, Morse, was also found common at Clark's 

 Ranch by Harford and Dunn. 



As mentioned by me in vol. iv, p. 223, no locality along this 

 coast has furnished as many species as the neighborhood of S. F. 

 Bay. Northern and southern forms here meet also in larger 

 numbers than elsewhere, though it does not form the limit in 

 either direction for many of them. 



Two species oi Liviacidce%i\\\ undetermined are also cojiimon, 

 one resembling L. campestris, Binn., and found in nearly all 

 parts of the State, the other like L. Jlavus, Linn., but distinct, 

 its shell one- fourth of an inch long. 



The following table shows the species occurring here, as well 

 as their marked varieties, with the sides of the Bay on which 

 they occur. 



It will be noticed that all of the § C except one are found 

 here, making it the metropolis of Arionta on this coast. That 

 hybrids and varieties should be met with is therefore not aston- 

 ishing. 



