SCIENTIFIC INDEX. 



Ixv 



Heterodictya, 163. 



gigantea, 166. 

 Heterospongia, 78. 



subramosa, 79, 78. 

 Heterotrypa, 267, 107, 269, 270, 273, 313. 



frondosa, 267, 103, 268. 



mammulata, 267. 



proliflca, 268. 



singularis, 268. 



ulrichi, 270. 



vaupeli, 313. 



Heterotrypidse, 267, 107, 109, 269, 274, 289. 

 Hexactinellidas, 55. 

 Hindis, 79, 80 



inaequalis, 80. 



parva, 79, 80. 



spheroidalis, 80. 

 Hippothoa, 117. 



inflata, 117. 



Holobranchia, 105, 104. 



Homotrypa, 235, 106, 186, 214-21H, 221, 222, 228, 

 240, 265, 266, 272. 



collosa, 243, 222. 



curvata, 235, 244. 



exilis, 236, 216, 237, 239. 



flabellata, 103. 



insignis, 239, 240. 



intercalaris, 238*. 216, 235, 241. 



minnesotensis, 235, 215, 216, 237. 

 var. montifera, 236. 



obliqua, 241, 243. 



separata, 237, 216, 235. 



similis, 242, 265, 301, 312. 



subramosa, 239, 216, 240. 

 var. insignis, 240. 



tuberculata, 24O, 227, 284. 

 Homotrypella, 228, 106, 215, 229, 235. 



gracilis, 233, 231. 



granulifera, 234, 233. 



instabilis, 229, 228, 230, 231, 234. 



intercalaris, 232. 



multiporata, 23O, 234. 



mundula, 232*, 234. 



ovata, 231, 215, 216, 239, 241. 



rustica, 234. 



similis, 215. 



subgracilis, 23O. 

 Hyalostelia smithii, 55. 72. 

 Hydroida, 80. 

 Hydrozoa, 81, 80. 

 Hyolithes, 317. 



baconi, 317. 

 Hypoxylese, 3. 



Icthyorachis, 106,110. 

 Idiotrypa, 107, 290. 

 Ilex, 5. 

 Inoceramus, 53. 



crispii var. barabini, 53. 

 Intrapora, 106, 110, 162. 

 Intricaria, 208. 



clathrata, 211. 



reticulata, 210. 

 Iron ores, Cretaceous, 54. 



Isehadites, 61 , 57, 63-65, 67, C,7, 72, 74. 



bursiformis, 61. 



canadensis, 66. 



circularis, 65. 



cyathiformis, 65. 



hemisphericus, 66. 



iowensis, 64, 57, 65. 



jonesi, 65. 



koenigii, 64-66. 



squamifer, 66. 



subturbinatus, 66. 



synopsis of American species, 65. 



tessellatus, 66. 

 Isotrypa, 106, 110. 



Juglans, 8, 5, 19. 



debeyana, 19, 9. 



latifolia, 19. 

 Jurassic, Bryozoa, 111, 121; flora, 3, 2. 



Kampylopegrnata, 471, 473. 

 Keuper, Calamarieae, 2. 

 Klitambonites, 377. 

 Knorria, 2. 



Lagena, 35, 28. 



aspera, 35, 52. 



favosa-punctata, 36, 52. 



hispida, 35, 52. 



jeffreysii, 35. 



parkeriana, 35. 

 Lagenidaj, 35. 

 Lageninae, 35. 

 Laramie group, flora, 4. 

 Lauraceae, 5, 

 Laurineae, 7. 



Laurophyllum reticulatum, 22. 

 Laurus, 8, 5. 



nebrascensis, 15, 9, 22. 



plutonia, 14, 9, 15, 21, 22. 



proteifolia, 15. 



species, 22. 

 Lead fossil, 59. 

 Leguminoseas, 5. 

 Leguminosites, 21. 



species. 22. 9. 



Leioclema, 107, 98, 110, 111, 308, 313. 

 Lenticuliles complana, 46, 45. 



planulata, 46. 

 Leperditia fabulites, 473. 

 Lepidodendron, 6, 2. 

 Lepidolites, 67, 57. 



dickhauti, 67. 



elongatus, 67. 

 Lepidophloios, 2. 

 Leptasna, 4O9, 400, 410, 411, 413, 413. 



alternata, 404, 400, 405. 



aspera, 414, 415. 



camerata, 403, 404. 



charlottaa, 410,411. 



deltoidea, 401, 394, 395, 403. 



incrassata, 401, 402, 410. 



minnesotensis, 414. 



