PSAMMOBOSm)^. 
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. hoc. Lower Carboniferous Limestone ; Armagh, Ireland. 
P. 2595-6. Type specimen and broken tooth. EtirdshUlen Coll. 
P. 2493-4. Type specimens of Mylax batoides, 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. Iviii. figs. 0-11. 
1883. Fhymodus transversus, J. \V. Davis, loc. cit. p. 473, pi. Iviii. 
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. atiriculatus ; 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. Toe. Lower Carboniferous Limestone : Armagh, Ireland. 
Unless otherwise stated, the following specimens are from the 
Enniskillen Collection : — 
P. 2586-8. Tj-pe specimens. 
P. 9258, 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 
