398 EXPLANATION OF PLATES. 



FIGURE. PAGE. 



17, 18. Tropidoceras Actseon, d'Orb. Jurassic, Europe, . *78 



19, Platypleuroceras latecosta, Sowb. Lias, Europe, . . 76 



20, 21. Arcestes tornatus, Bronn. Trias, Europe, . . 66 

 22, 23. Agassiceras Scipionianus, d'Orb. Jurassic, Eur., . 75 

 24,25. Pleuroceras spinatus, Brug. Lias, Europe, . . 73 

 26, 27. Amaltheus margaritatus, d'Orb. Lias, Europe, . 73 

 28, 29. Lytoceras Moreleti, Hauer. Trias, Europe, . . 76 

 30, 31. Trachyceras bicrenatus, Hauer. Trias, Europe, . 69 



Plate 39. 



32, 33. Didymites angustilobatus, Hauer. Trias, Europe, . 66 



34, 35. Cycloceras Yaldani, d'Orb. Lias, Europe, . . 76 



36, 37. Leioceras complanatus, Brug. Jurassic, Europe, . 78 



38, 29. Phylloceras occultum, Mojs. Hallstadt, . . .77 



40, 41, 42. Otoceras Woodwardi, Griesb. L. Trias, Himal., 72 



43, 44. Medlicottia Wynnei, Waagen. Carboniferous, India, 72 



Plate 40. 



77 

 81 

 72 

 73 

 67 

 84 



45. Ophiceras Tibeticum, Grriesb. L. Trias, Himalayas, 



46, 47. Cosmoceras Calloviense, d'Orb. Jurassic, France, 

 48, 49. Sageceras Haidingeri, Hauer. Trias, Hallstadt, 

 50,51. Oxynoticeras Guibalianum, d'Orb. L. Lias, Eur., 



52, 55, 56. Tropites Ramsaueri, Quenst. Trias, Europe, 



53, 54. Olcostephanus Bhawani, Stol. India, 



57. Oppelia subradiata, Sowb. Min., Conch., . . .78 



58, 59. Lobitesellipticus, Hauer. Trias, Europe, . .67 



Plate 41. 



60,61. Perisphiuctes arbustigerus, d'Orb. Jurassic, France, 81 

 62, 63. Stoliczkaia dispar, Stol. Cret., India, . . .83 

 64,65. Peltoceras Arduennense, d'Orb. Jurassic, France,. 82 

 66, 67. Simoceras Jooraensis, Waagen. Jurassic, India, . 82 

 68, 69. Hoplites archiacianus, d'Orb. Cretaceous, France, . 83 



Plate 42. 



1. Hyalsea tridentata, Gmel. Atlantic, Mediterranean, . 90 



2. Hyalaaa qna,dridentata, Lesueur. Tropical Seas, . , 90 



3. Cleodora.compressa, Eyd. Tropical Atlantic, , . 90 



4. 5. Cleodora (Balantium) inflata, Eyd. Trop. Atlantic. 90 

 6. Styliola subulata, Q,uOy. Tropical Seas, 91 

 T, 8. Hyalasa (Diacria) trispinosa, Lesueur. Tropical 



. Atlantic, . . . . . . . . .90 



9. Cuvieria columella, Rang. So. Atlantic, . . .91 



10. Eurybia (Psyche) globulosa, Souleyet. Newfoundland, 98 



11. Hyolithes fasciculatus. Palaeozoic, . , . . .92 



