PS AMMODOXTIUiE. 
97 
separated by a straight or slightly curved transverse suture, about 
half as large as the anterior portion. The anterior margin of the 
tooth strongly convex, and the posterior margin slightly so ; the root 
extending far beyond the crown on either side, and produced back¬ 
wards at the postero-lateral angles. 
Form. Sf Log. Lower Carboniferous Limestone : Armagh, Ireland. 
P. 2595-6. Type specimen and broken tooth. Enniskillen Coll. 
P. 2493-4. Type specimens of Mylace batoicles , both fragmentary. 
Enniskillen Coll. 
P. 5325. Two more perfect examples. Enniskillen Coll. 
Copodus prototypus (Davis). 
1862. Labodus prototypus (Agassiz MS.), Morris & Roberts, Quart. 
Journ. Geol. Soc. vol. xviii. p. 101 (name only). 
1883. Labodus prototypus, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i. p. 468, pi. lviii. figs. 9-11. 
1883. Fhymodus transversus , J. W. Davis, loc. cit, p. 473, pi. lviii. 
fig. 17. 
Type. Detached teeth; British Museum. 
Teeth much broader than long, and strongly arched antero-pos- 
teriorly. The lateral margins of the crown are upturned and the 
median portion much raised; the root extends considerably beyond 
on either side, and its postero-lateral angles are somewhat produced 
backwards. The unabraded coronal surface is very slightly rugose, 
and there is occasionally one sinuous transverse suture—sometimes 
two—imperfectly marked. 
These are probably the opposing teeth of Copodus spatulatus , and 
perhaps also of C. lingua and C. auriculatus ; they have, however, 
not yet been discovered in their natural position, and it is thus con¬ 
venient to retain provisionally the specific name already proposed for 
them. 
Form, Log. Lower Carboniferous Limestone : Armagh, Ireland. 
Unless otherwise stated, the following specimens are from the 
Enniskillen Collection:— 
P. 2586-8. Type specimens. 
P. 9253, P. 2594. About forty specimens in various stages of wear 
and abrasion. Some are deeply worn in the middle, one 
also at each side. A few show a single transverse suture, 
one has two sutures. 
H 
