INDEX. 



Mount. Potts, New /calami, 154. 



Muschelkalk of Europe, lower, 12, 13, 102; middle, 13; 



upper, 13. 



Muschelkalk, Germany, 9, 12, 13, 65, 102. 

 Nevada, Middle Triassic of, 18; West Humboldt 



Range, 18; New 'ass Range, 19. 

 New Pass Range, Nevada, 19, 104, 123, 124. 120; 



characteristic species of, 19. 

 New Zealand, Triassic of, 14, 20, 154. 

 Niederschach, 13. 



Nordenskiold, 148, 149; expedition, 14. 

 Ouereggingen, 13. 

 Ober-Schlesien, 9. 



Occurrence, geologic and geographic, 12. 

 OpthalmosauruB icenicus, 23, 58. 

 Origin of Ichthyosauria, 77. 

 Osborn, II. V., cited, 61, 77. 



Osmont, V. C., acknowledgment of assistance, 138. 

 Owen, R., cited, 24, 37, 107, 149. 



Palaeohatteria, pelvis of, 57; pectoral arch of, 61, 62. 

 Palaeohatteria longicaudata, 42. 

 Phillips, J., cited, 14. 155. 



Phytosauria, rib articulation of, 51; relationships, 78. 

 Pit river, California, 15, 128, 129, 138, 142. 

 Pit shales, 17. 



Plates, explanation of, 158-192. 

 Podial, author's usage of term, 63. 

 Pranger, Professor, reference to work of, 9. 

 Procolophon, pelvis of, 55, 57. 

 Proteosaurus, 80. 



Quenstedt, F. A., reference to work of, 9. 

 <Juerfurt, Wellenkalk of, 13. 

 Karhitrema pellati, 154. 

 Rangitata district, New Zealand, 14, 154. 

 Reed, W. H., acknowledgment of assistance, 6. 

 Reiflingen, 9. 

 Rcpossi, cited, 11, 23, 29, 34, 54, 55, 70, 83, 95, 96, 



97, 98, 99, 100, 101, 102, 103. 

 Ehaetic of England, 14, 154, 155; of France, 10, 14, 



153. 



Rohrdorf, 13. 



Ribs, general structure of, 47. 

 Saone-et-Loire, -trance, 10. 

 Saurian Hill, Nevada, 18, 19, pi. 1, fig. 1. 

 Sauvage, H. E., cited, 10, 14, 153, 154. 

 Schleimser Joch, 9. 

 Sclerotic ring, 24. 

 Shasta County, California, Upper Triassic of, 15, 128, 



129, 137, 138, 142. 

 Shastasauridae, 83, 87. 

 Shastasaurinae, 53, 87, 89. 

 Shastasanrus, 137. 

 Shastasaurus alexandrae, 142. 

 Shastasaurus altispinus, 144, 34, 52, 145, pi. 18, figs. 1, 



2, 3, and 4. 



Shastasaurus careyi, 145, 33, 64; pi. 15, fig. 2; pi. 18, 



figs. 5 and 6. 



Shastasaurus osmonti, 138, 30, 33, 34, 48, 56, 59, 64, 

 66. 73; pi. 15, figs. 1, 3 and 4; pi. 16, figs. 1 

 to (i; pi. 17, fig. 1. 



Shastasaurus pacificus, 143; pi. 17, fig. 3. 

 Skeletal structure of the Iriassic ichthyosaurs, 20. 

 Abdominal rib plastron, 54. 

 Dentition, 27. 

 Limb-arches, 54. 

 Limbs, 63. 

 Ribs, 47. 

 Skull, 20. 

 Vertebrae, 2!). 



Skull, general structure, 20. 

 Facial region, 21. 

 Fronto-parietal region, 23. 

 Mandible, 26. 

 Occipital region, 24. 

 Orbital region, 23. 

 Palatine region, 26. 

 Quadrate and suspensorium, 25. 

 Temporal region, 24. 

 Smith's Cove, California, 129, 138, 142. 

 Smith, James Perrin, acknowledgment of- assistance, 



6; cited, 15, 16, 18, 19, 125. 

 Spitzbergen, Triassic of, 14, 20, 94, 148, 149. 

 Squaw Creek, Shasta County, California, 15, 128, 129, 



138, 142. 



Stage of evolution of Triassic Ichthyosaurs, 73. 

 Stenopterygius, 80. 

 Stereosternum, pelvic arch, 55, 57; pectoral arch, 61, 



62. 



Steiermark, 9, 13. 

 Straight Canon, Nevada, 18. 



Stuttgart, Konigliches Naturalien-Cabinet, collections 

 of, 12, 49, 91; Technische Hochschule, collec- 

 tions of, 12, 91. 



Swabian, Trias localities, 12, 13. 

 Systematic descriptions, 90-155. 

 Cymbospondylus, 103. 



Cymbospondylus nevadanus, 124. 

 Cymbospondylus petrinus, 104. 

 Cymbospondylus piscosus, 123. 

 Cymbospondylus (?) natans, 150. 

 Cymbospondylus (?) nordenskioldii, 148. 

 Cymbospondylus (?) polaris, 149. 

 Delphinosaurus, 131. 



Delphinosaurus perrini, 131. 

 Ichthyosaurus, 152. 



Ichthyosaurus carinatus, 153. 

 Ichthyosaurus ( ?) hectori, 154. 

 Ichthyosaurus (t) rheticus, 153. 

 Ichthyosaurus, sp. 154. 

 Merriamia, 129. 

 Merriamia zitteli, 129. 



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