1911.] NATURAL SCIENCES OF PHILADELPHIA. 199 



Plate XIII— Or eoh el It strigosa depressa Ckll. — Figs. 1, 3, 5.— Jacobs Canyon, 



Station 69. No. 103,20S Acad. Nat. Sci. Phila. 

 Figs. 2, 4.— Jacobs Canvon, Station 70. No. 103,143. 

 Fisjs. 6, 7.— First gulch opening west above Warm Spring Canyon, Station 



66. No. 103,141. 

 Fig. 8.— Warm Spring Canyon, Station 62. No. 103,13S. 

 Fig. 9.— Warm Spring Canyon, Station 61. No. 103,116. 

 Figs. 10-12.— Shin umo Canyon, Station 50. No. 103,148. 

 Figs. 13-15.— Shinumo Canyon, Station 55. No. 103,197. 

 Fig. 16.— Moquitch Gulch, Station 76. No. 103,205. 

 Figs. 17, 18.— Moquitch Gulch, Station 75. No. 103,204. 

 Figs. 19-21.— Castle Spring, Snake Gulch, Station 79. No. 103,172. 

 Figs. 22, 23.— Quaking Asp Canyon, Station 91. No. 103,226. 

 Figs. 24-26.— Quaking Asp. Canyon, Station 98. No. 103,157. 

 Figs. 27, 28 — Head of Quaking Asp Canyon, Station 84. No. 103,161. 



Plate XIV. — Oreohelix strigosa depressa Ckll. — Figs. 1-4. — North end of Powell 

 Plateau, Station 17. No. 103,186. 

 Figs. 5-9.— North end of Powell Plateau, Station 15. No. 103,179. 

 Figs. 10, 11.— North end of Powell Plateau, Station IS. No. 99,158. 

 Figs. 12-15.— West side of Powell Plateau, Station 16. Nos. 94,159 and 



103 1^8 

 Fie. 16.— West side of Powell Plateau, Station 19. No. 103,1S0. 

 Figs. 17-21.— East side of Powell Plateau, Station 103. No. 103,188. 

 Figs. 22, 23.— North end of Powell Plateau, Station 105. No. 103,177. 



