PLATE I. 
Fig. Page 
1, 2. Jancissa imbricata (IPCoy) ; two teeth with incomplete 
root, anterior and posterior aspects, and section.— 
U. Carbfs. Limst. ; Ticknall, Derbyshire. [P. 5339.] 38 
3. Janassct clavcita (M‘Coy); tooth, anterior and posterior 
aspects, and section.— V. Carbfs. Limst. ; Beith, Ayr¬ 
shire. [46036.] 38 
4-7. Petaloclus acuminatus (Agassiz); four teeth, anterior 
and posterior aspects.—U. Carbfs. Limst. ; Ticknall, 
Derbyshire. [P. 5342.] 43 
8. Petaloclus flabelhda , sp. nov. ; tooth, posterior aspect.— 
Carbfs. Limst.; Oreton, Salop. P. 227 a.] -15 
9. Petalorhynchus psittacinus (M‘Coy), var. minor', tooth, 
anterior and posterior aspects, twice nat. size.-— 
L T . Carbfs. Limst.; Ticknall, Derbyshire. [P. 5340.] 41 
10-12. Ctenoptychius lobatus (Etheridge) ; three teeth, anterior 
and posterior aspects, twice nat. size.—Ibid. 
[P. 5342-3.] 52 
13. Pristodus benniei (Etheridge) ; supposed lower tooth, 
anterior aspect and section, showing root.—Ibid. 
[P. 5344 a.] 64 
14, 15. Copodus spatulatus , Davis ; two teeth, upper aspect.— 
Ibid. [P. 5362.] 94 
16, 17. Lophoclus serrcitus, Davis ; two teeth, posterior and 
anterior aspects.—Ibid. [P. 5345.] 225 
18, 19. Mesolophoclus problemciticus, gen. & sp. nov. : two 
teeth, anterior and posterior aspects.—L. Carbfs. Limst.; 
Armagh. [P. 2641.] 61 
20. Strebloclus colei , Davis ; dental plate, coronal aspect.— 
L T . Carbfs. Limst. : Ticknall, Derbyshire. [P. 5349.] 211 
21. Deltopiychius gibberulus , Davis; ‘‘lower" dental plate, 
coronal aspect.—Ibid. [P. 5351.] 215 
22. Xystroclus striatus (M‘Coy); “ upper ” dental plate, coronal 
aspect.—Ibid. [P. 5354.] 194 
23. 24. Poeciloclus jonesii (M‘Coy) : “ lower ” dental plates, 
coronal aspect.—Ibid. [P. 5355.] 204 
25. Ditto ; portion of “upper" dental plate, coronal aspect.— 
Ibid. [P. 5356.] 203 
