358 PROCEEDINGS OF THE ACADEMY OF [May, 



Explanation of Plates XIX, XX, XXI, XXII. 



Note. — The "stations" referred to are those of Messrs. Henderson and Daniels 

 Expedition of 1915. 



Plate XIX. — Fig. 1. — Oreohelix strigosa depressa (Ckll.) Manitou Canyon, 



Colorado Springs, Colo. 

 Fig. 2. — 0. s. depressa (Ckll.) Harkness Canyon, near McCammon, Idaho, 



Station 2. 

 Fig. 3. — 0. s. depressa form carnea (Hemph.). Drv Canyon, near Salt Lake 



City, Utah, Station 43. 

 Fig. 4. — 0. s. depressa (Ckll.). First gulch south of Logan Canyon, east of 



Logan, Utah, Station 41. 

 Fig. 5. — O. s. fragilis (Hemph.). About a mile west of Franklin, Idaho, 



Station 38. Penis only figured. 

 Fig. 6.— 0. s. depressa (Ckll.). About a mile up Emigration Canyon, 



southeast of Salt Lake City, Utah, Station 46. 

 Fig. 7. — 0. s. depressa (Ckll.*). Ogden Canyon, Utah, Station 22. 



Plate XX. — Fig. 1. — Oreohelix peripherica (Aneey). Ravine in east bluff of 



Bear River, just below Wheelon, Utah, Station 33, banded form, la, 



penis of same, pulled straight, with epiphallus. 

 Fig. 2. — 0. peripherica (Anc). Same station, white form. 

 Fig. 3. — 0. peripherica (Anc). East bank of Bear River below Cache 



Junction, Utah, Station 29. 3a, penis of same, opened to show internal 



structure. 

 Fig. 4. — 0. peripherica (Anc). Gulch opening into North Ogden Canyon, 



Station 26. A relatively smooth specimen. 

 Fig. 5. — 0. peripherica (Anc), Mountain northeast of Newton, Utah, 



Station 36. Smooth form of the species. . 

 Fig. 6. — 0. peripherica (Anc). East bank of Bear River, below Cache 



Junction, Utah, Station 30. 

 Fig. 7. — Oreohelix hendersoni Pils., one of the original lot. 

 Fig. 8. — Oreohelix strigosa depressa (Ckll.). Rock Canyon, east of Provo, 



Utah, Station 44. 



Plate XXI. — Fig. 1. — Oreohelix haydeni gabbiana (Hemph.). Oquirrh Mts., 



Station 15. 

 Fig. 2. — Oreohelix haydeni betheli Pils. and Ckll. Glenwood Springs, Colo- 

 rado. No. 94,059 A. N. S. P. 

 Fig. 3. — 0. haydeni mixta Pils. Glenwood Springs, Colorado. No. 94,058 



A. N. S. P. 

 Fig. 4. — Oreohelix haydeni corrugata Hend. and Dan. Small mountain 



southeast of Webster, Utah, Station 40. 

 Fig. 5. — Oreohelix s. depressa, form tooelensis Hend. and Dan. About 6 miles 



northeast of Tooele, Utah, Station 10. 

 Fig. 6. — Oreohelix strigosa buttoni (Hemph.). Taylor Canyon, near Ogden, 



Utah, Station 16. 

 Fig. 7 '.—Oreohelix strigosa depressa (Ckll.). Oquirrh Mountains, Utah, 



Station 13. 

 Fig. 8. — Oreohelix haydeni hybrida (Hemph.). Gulch south of Logan 



Canyon, Station 42. 



Plate XXII. — Fig. 1. — Oreohelix cooperi (W. G. B.), form maxima Pils. Yellow- 

 stone National Park. No. 96,973 A. N. S. P. 



Fig. 2. — 0. cooperi (W. G. B.). McCammon, Idaho, Station 1. 



Fig. 3.— O. cooperi (W. G. B.). Gleneyre, Colorado. No. 82,185 A. N. S. P. 



Fig. 4. — O. cooperi (W. G. B.). Eureka, Utah, Station 6. 



Fig. 5. — O. haydeni mixta Pils. Glenwood Springs, Colorado. No. 94,796 

 A. N. S. P. 



Fig. 6. — Oreohelix yavapai extremitatis Pils. and Ferr. Shell, Wyoming. 

 6a, penis of same, opened, with the epiphallus. 



