398 EXPLANATION OF PLATES. 
i 
FIGURE. PAGE 
17, 18. Tropidoceras Actzon, 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, . et es 
26,27. Amaltheus margaritatus, d'Orb. Lias, Europe, . 173 
28, 29. Lytoceras Moreleti, Hauer. Trias, Europe, 5 » a6 
30, 31. Trachyceras bicrenatus, Hauer. Trias, Europe, . 69 
PLATE 39. 
32, 33. Didymites angustilobatus, Hauer. Trias, Europe, . 66 
34, 35. Cycloceras Valdani, d’Orb.  Lias, Europe, . L G6 
36, 37. Leioceras complanatus, Brug. Jurassic, Europe, . 78 
38, 29. Phylloceras occultum, Mojs.. Hallstadt, : 17 
40, 41, 42. Otoceras Woodwardi, Griesb. | L. Trias, Himals 72 
43,44. Medlicottia Wynnei, Waagen. Carboniferous, India, 12 
PLATE 40. 
45. Ophiceras Tibeticum, Griesb. L. Trias, Himalayas, . 77 
46, 47. Cosmoceras Calloviense, d’Orb. Jurassic, France,. 81 
48,49. Sageceras Haidingeri, Hauer. Trias, Hallstadt, . 72 
50,51. Oxynoticeras Guibalianum, d’Orb. L. Lias, Eur., . 738 
52, 55,56. Tropites Ramsaueri, Quenst. Trias, Hurope, . 67 
53, 54. Olcostephanus Bhawani, Stol. India, —. : , IBA 
57. Oppelia subradiata, Sowb. Min., Conch., . ; SES 
58, 59. Lobites ellipticus, Hauer. Trias, Europe, PD. 6T 
PLATE 41. 
60, 61. Perisphinctes arbustigerus, d’Orb. Jurassic, France, 81 
62, 68. 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. 
|. Hyalea tridentata, Gmel.. Atlantic, Mediterranean, . 90 
2. Hyalea quadridentata, Lesueur. Tropical Seas,. . 90 
3. Cleodora compressa, Eyd. Tropical Atlantic, . 90 
4, 5. Cleodpra (Balantium) inflata, Eyd. Trop. ‘Atlantic, 90 
§. Styliola subulata, Quoy. Tropical Seas, 91 
7, 8 Hyalea-: (Diacria) trispinosa, Lesueur. Tropical 
Atlantic,, . : : ea 
9. Cuvieria columella, Rang, So. Atlantic, ; Sul 
10. Eurybia (Psyche) globulosa, Souleyet.. Newfoundland, 98 
It. Hyolithes fasciculatus. “Paleozoic; ~~ *. 92 
