. Annual report. 1st-12th, 1867-1878. Geology. Camp 26: Baker's Park L „ 25 specimens. Camp 26: Cunningham Gnlch, 11,000 feet 6 specimens. Camp D : Animas 25 specimens. North Park {Barber) , =..... 10 specimens. This beautiful little shell, described by Mr. Thomas Bland, from my specimens, as above, was not found by me north of the crests of the sier- ras about Baker's Park, but was not uncommon on their southern slopes, where I first found it clinging to vertical and all but inaccessible cliffs in Cunningham Gulch, at an altitude of over 11,000 feet, exposed to daily snow-storms; ye
. Annual report. 1st-12th, 1867-1878. Geology. Camp 26: Baker's Park L „ 25 specimens. Camp 26: Cunningham Gnlch, 11,000 feet 6 specimens. Camp D : Animas 25 specimens. North Park {Barber) , =..... 10 specimens. This beautiful little shell, described by Mr. Thomas Bland, from my specimens, as above, was not found by me north of the crests of the sier- ras about Baker's Park, but was not uncommon on their southern slopes, where I first found it clinging to vertical and all but inaccessible cliffs in Cunningham Gulch, at an altitude of over 11,000 feet, exposed to daily snow-storms; yet these specimens were, if anything, finer than those subsequently found along the Bio Las Animas. Mr. Barber's ex- amples are all dead shells, and are not so large or perfect. They were found at an altitude not exceeding 8,000 feet, but the station is not stated. Mr. W. G. Binney, who dissected the animal of this species, which seemed with difficulty to wholly retreat into the shell, communicated the following particulars of its anatomy : " Jaw low, wide, slightly arcuate, ends slightly attenuated, whole anterior surface with about 22 broad, flat, slightly-separated ribs, whose ends denticulate either margin. This form of jaw is usual among the Helicinae. It is of the same type as H. Lansingi (Ann. Lye. N. H. of N. Y., xi, 74, fig. 2). Lingual membrane long and narrow. Teeth about 16-1-16. Centrals as usual in the Helicince; the side-cusps and cut- ting points are well developed, the base of attachment longer than wide. Laterals of same type, but unsymmetrical, and consequently only bicuspid. The change from laterals to marginals is very gradual, there being no splitting of the inner cutting-point. Marginals low, wide, with one inner, long, blunt cutting-point, and one outer small, blunt cutting- ; Helix lineatus, Say. Camp D: Animas Valley 1 specimen. Bio Cham a, N. Mex. [Binney and Bland); Salmon Biver, Idaho {Hemp- hill). North America except Pacific coast
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