384 KXPLAXATION OF PLATES, VOL. XXV. 



FIGURE PAGE 



6. Vertigo c. catalinaria St. S. Catalina I. 62362 142 



7. Vertigo rowelli Newc. Douglas Co., Ore. 76372 143 



8. Vertigo e. diegoensis St. San Ramon. 64578 141 



9. Vertigo c. triiiotata St. Monterey. 62363 140 



10. Vertigo c. eupressicola St. Cypress Point. 118835.. 143 



1 1. Vertigo c. diegoensis St. San Ramon. 64578 141 



12. Vertigo columbiana St. Vancouver I. 68881 108 



13. Vertigo columbiana St., var. Olympia. 11661 108 



PLATE 10. 



1. Vertigo modesta Say. Laggan, Alberta. 7637") 123 



2. Vertigo modesta Say. Loess, Des Moines, la. 79797 . . 123 



3. Vertigo in. corpulenta Mse. Ogden canyon, Utah. 



11663 '. 130 



4. Vertigo m. parietalis Ane. Ogden canyon, Utah. 



11659 " 128 



5. Vertigo m. castanea St. Rae Lake. Cal. 115214 132 



6. Vertigo m. castanea St. Type, Fish Camp, Cal. 11655. 132 



7. 8. Vertigo arctica Wallenh. After Wallenbaum 189 



8. Vertigo concinnula Ckll. Type, Custer Co., Colo. 



59095 .' 119 



10. Vertigo concinnula Ckll. Jemez Mts., N. M. 73587.. 119 



11. Vertigo occidentelis St. Bluff Lake meadow, San 



Bernardino Mts. 105048 134 



12. 13. Vertigo m. insculpta Pils. Mt. Lemon, S. Cata- 



linas. 109538, 109547 131 



PLATE 11. 



1. Vertigo dalliana St. Type, 416 Sterki coll 137 



2-5. Vertigo sterkii Pils. Type and paratypes. 43706 . . 112 



6, 8. Vertigo a. sanbernardinensis Pils. Cienaga below 



Bluff Lake. 118419 Ill 



7. Vertigo a. sanbernardinensis Pils. 20 miles north of 



Yosemite. 114796 Ill 



9. Vertigo andrusiana Pils. Oswego, Ore. 113980 109 



10. 11. Vertigo andrusiana Pils. (Pig. 10 the type.) 



Douglas Co., Ore. 76380 " 109 



12. Vertigo binneyana St. Paratype. Helena, Mont. 



11672 ' 90 



PLATE 12. 



1-3. Vertigo tridentata Wolf. Fig. 2 the tvpe. Canton, 



III. 58008 106 



