S18 
THE LIAS AMMONITES. 
Tertiary. 
Cretaceous. 
Jurassic. 
Triassic. 
Permian. 
Carboniferous. 
Devonian. 
Silurian. 
31 Ort.liorftras 
• • • 
* 
* 
% 
8'^ Trfitofifivas 
' " * 
* 
33. Hiironia 
84 Aohiiiooftras . 
% 
35. Ormoceras . 
* 
* 
36. Aulacoceras . 
37 Endoceras 
. . . 
. . . 
* 
38. Caiueroceras 
• • • 
* 
* 
* 
39. Trochoceras 
. . . 
40 TTftvrnrftvas 
• . « 
. . . 
* 
41 GroiniDhoceras 
* 
43. Phraguioceras 
48 Aspoppras 
44. Glossoceras . 
* 
45. Aphragmites 
* 
46 Aturia 
* 
47. Nothoceras . 
* 
48 Tiath mopfiras 
40 GrOTiifippras 
... 
... 
* 
5u (roniatites 
* 
* 
* 
* 
51 ClvmPTiia 
* • " 
* 
... 
.52 l^apt,i')t,ps 
* 
* 
58 Clvdonites 
. . . 
. . . 
54 Choristoppras 
. . . 
. . . 
5.5 T{ haVirloppras 
. . . 
56. Cochloceras 
* • • 
• • • 
57. Ceratites 
58. Baculina 
* 
... 
... 
... 
,59 Ammonitps 
* 
60 Cnoppras 
61 Toxoppras 
* 
62 Spanhitps 
* 
68 Anpvlnppras 
* 
* 
fi4 Pf.vphoppii'as 
* 
65. Hamites 
66. Hamulina . 
67. Baciilites 
68. Turrilites . 
» 
* 
69. Helicoceras. 
* 
70. Heteroceras 
71. Anisoceras . 
* 
