INDEX. 



Names in italic are synonyms; figures In blackface indicate descriptions; figures in itoZzc indicate illustrations. 



Page. 



Alaska, Arctic coast of, Colville "series" on 23-24 



Arctic coast of, elevation of, as an indication of age 24-25 



fossils collected on 23, 25-28 



geology of 23-26 



Gubik sand on 24 



climate of, in Tertiary time 25 



migration of Asiatic animals to 25 



Antiplanes? cf. A . purpurea 28 



Asimina, climate required by 2 



eocenica Lesquereux (?) 7-8 



age of 3, 4 



Astarte ac tis Dall, n. sp Z\,37 



carteriana Dall, n. sp 31-32, 37 



(Gonilia?) diversa Dall, n. sp 33,36 



hemicymata Dall,n. sp 32-33,37 



lefBngwelli Dall, n. sp 32, 37 



martini Dall, n. sp 32, 37 



Atlantic Ocean and Bering Sea,intermigration of marine faunas of 25-26 



B. 



Baker, C. L., fossils collected by. 1 



Bering Sea and ,\tlantic Ocean, intermigration of marine faunas of. 25-26 

 Bonine, C. X., acknowledgment to 11 



Cadulus arcticus Dall, n. sp 30, SS 



Carter Creek, Alaska, section on 24 



Chrysodomus leflingweUi 28-29, 36 



meslcri Dall, n. sp 28, 36 



Conrad, T. A., cited 70 



Cryptoctenidia magna Dall, n. sp 30, 36 



Cyrtodaria camdenensis DaU, n. sp 33-34, 36 



F. 



Flabcllaria eocenica 4 



FossUs, Texas, age of 1,3-4 



Texas, climate indicated by 2-3 



locality of 1-3 



G. 



Geonomites, climate required by 2 



visianii Berry, n. sp 4,5-7 



age of 3-4 



H. 



Hemithyris psittacea Gmelin var. alaskana Dall, n. var 34, 36 



Ilex, climate required by - 2-3 



barillensis Berry, n. sp 5, 8 



age of 3-4 



J. 



Jordan coal field, Mont., Bearpaw shale in. 



Benton formation in 



Claggett formation in 



Colorado shale in 



16 



14 



15 



14 



Cretaceous formations in 14-16 



Cretaceous, Upper, history of 19-21 



Eagle sandstone in 14-15 



formations in, section of -• 12 



geologic map of 12 



geology of 11-21 



Judith River formation in 15-16 



Kootenai (?) formation in 14 



Lance formation in - ■■ 17-18 



Jordan coal field, Mont., location and area of. 11 



Niobrara formation in u 



sandstones in , source of 18-19 



stratigraphy of 11-18 



structure of 



surface features of 



Tertiary (?) formation in . 

 Juglans, climate required by. 



rugosa Lesquereux 



age of 



18 

 11 

 17-18 

 2 

 7 

 3,4 



L. 



Lepidocyclina, age of 39 



American species of, features of 55-56 



key to 56-57 



list of 39-40 



antUlea Cushman IS, 105 



attenuata Cushman, n. sp ST, 94 



locaUties collected from 67 



caneliei Lemoine and R. Douville - 75-76. 102 



var. yumagunensis Cushman 76, 102, 103 



chaperi Lemoine and R. Douville 64,9.2 



chattahoocheensis Cushman. n. sp 65, 93, 94 



locaUties collected from 65 



cookei Cushman 66-67,9.^ 



crassata Cushman 74-75, 101 



duplicata Cushman 78-79, 105 



favosa Cushman 66, 95 



floridana Cushman, n. sp 67, 68, 95 



localities collected from 68 



fragilis Cushman, n. sp 63-64,92 



locaUties collected from 64 



georgiana Cushman, n. sp 60-63, S6, 87, 88 



localities collected from 61, 62 



gigas Cushman 63,89 



var. mexioana Cushman, n. var 63,89,00,91 



hiUi Cushman, n. sp 60,85,86 



kempi (O'Connell) Cushman 79 



macdonaldi Cushman n,104 



manteUi (Morton) Giimbel 57-59, 82-84 



locaUties collected from 59-60 



marginata (Michelotti) Lemoine and R. Dou-\aUe 73-74,^0/ 



localities collected from 74 



morgan! Lemoine and R. Douville 74 



mortoni Cushman, n. sp 70-71, 97, 98 



ocalana Cushman, n. sp 71-72,98,99 



localities collected from 71-72 



var. subdecorata Cushman, n. var 72. 98 



panamensis Cushman 77-78, 104 



perundosa Cushman 68, 96 



pseudocarinata Cushman, n. sp 66, 94 



locaUties collected from 66 



pseudomarginata Cushman, n. sp 69, 96 



schlumbergeri Lemoine and R. Douville 69 



subrauUnii Cushman 73,100 



sumatrensis (H. B. Brady) Jones and Chapman 16-11,103 



locaUties collected from 76 



supera (Conrad) H. Douville 69-70,96 



locaUties coUeoted from 70 



undosa Cushman 68-69, 95 



unduJata Cushman 60, S5 



^■aughani Cushman 64-65, 92 



Lesquereux, Leo, cited 7 



Littorina paUiata Say 29-30, 36 



107 



