94 
SELACHII. 
P. 2579. A much worn and abraded specimen, figured by J. W- 
Davis, 1. e. pi. Iviii. fig. 1, as C. cornutus. 
P. 2514, P. 2585. Eighteen examples, some broken and much ab- 
raded, some perfect, and showing more or less of the pos- 
terior portion of the tooth. 
P. 2496-7. Type specimens of Mylaeodm quadratus. 
P. 2495. Type specimen of MylacodvLS sesamini. 
P. 2498. Thirty-two specimens, relatively short, some much broken 
and abraded, two showing the posterior portion of the 
tooth in position. 
P. 1408-9. Four imperfect examples. Egerton Coll. 
P. 2504 a. Perfect tooth with base, wanting hinder portion. 
26053 a. Very broad broken specimen, showing hinder portion of 
tooth in position. Purchased, 185 
P. 5362. Three small teeth ; Ticknall, near Melbourne, S. Derby 
shire. Two are shown, of the natural size, in PI. 
figs. 14, 16. Wilson Coll. 
Copodus furcatusy Davis. 
1862. Copodus fcdcatus, Morris & Eoberts, Quart. Journ. Geol. Soc. 
vol. xviii. p. 100 (name only). 
1883. Copodus furcatus, J. W. Davis, Trans. Eoy. Dublin Soc. L J 
vol. i. p. 460, pi. Iviii. fig. 10. 
Type. Detached tooth ; Eritish Museum. 
Teeth similar to those of C. spatidatus, but having the posterior 
portion separated by a suture strongly bent in the middle, giving to 
the detached piece a triangular form. 
Form. ^ Loc. Lower Carboniferous Limestone : Armagh, Irelan 
P. 2509. Type specimen. Enniskillen Coll. 
Copodus lingua (Davis). 
1862. Mesogomphus lingua (Agassiz MS.), Morris & Eoberts, Quart, 
Journ. Geol. Soc. vol. xviii. p. 101 (name only). 
1883. Mesogomphus lingua, J. W. Davis, Trans. Eoy. Dublin Soc. |_ 
vol. i. p. 471, pi. Iviii. fig. 16. 
Type. Imperfect detached tooth ; British Museum. 
Teeth longer than broad ; crown flat ; the anterior margin 
