478 On the Fossil Fishes of the Carboniferous Limestone Series of Great Britain. 
depression is worn from the anterior margin to within ‘1 of an inch of the 
posterior one. Coronal surface enamelled, closely and deeply punctate. Anterior 
margin, concave, lateral ones straight, diverging posteriorly. Posterior margin 
concave, posterolateral angles, acute. Base, thin but not well exposed. Unique 
example. 
This species differs from the former in having less prominent lateral coronal 
borders, flat surface, and in the acuteness of the postero-lateral angles. 
Formation and locality : Carboniferous Limestone, Armagh. 
Lx coll. Kar) of Enniskillen. 
Genus Dimyleus, Agass. MSS. 
Dimyleus—L. Agassiz, 1859. MSS. Enniskillen Collection. 
Palatal teeth small, subquadrate; crown, convex; coated thinly with 
enamel; punctate; transverse sulcus divides the crown into two parts, and 
probably indicates two teeth. Anterior margin, convex ; posterior margin, con- 
cave ; lateral margins, constricted towards the transverse sulcus, otherwise straight. 
Base, buried in matrix, extends slightly beyond lateral margin of the coronal 
surface. 
Dimyleus woodii, Agass. MSS. 
(Pl LVIIL., fig. 24.) 
Dimyleus woodii—L. Agassiz, 1859. MSS. Enniskillen Coll. 
s 5 Morris and Roberts, 1862. “ Quart. Journ. Geol. Soe.,” Vol. XVIIT., p. 100. 
5 > Enniskillen, 1869. “Catal. Type Specimens,” p. 5. 
* 5 J.J. Bigsby, 1878. “Thes. Dev.-Carb.,” p. 355. 
Teeth, sub-quadrate, small, divided by a transverse depression or suture into two 
parts. It appears very probable that there are two teeth but the whole of the 
basal portion being embedded in the matrix, this cannot be satisfactorily ascertained. 
Crown, convex, thinly coated with enamel, punctured, rather more coarsely towards 
the border of the crown than in the centre. Anterior margin convex, lateral margin 
straight, slightly depressed where the suture crosses the face; posterior margin 
slightly concave; antero- and postero-lateral angles obtuse. A suture-like depression 
extends transversely across the crown dividing it into two unequal parts, the 
postenor rather longer than the anterior. Total length ‘4 of an inch, breadth ‘35 
of an inch. 
This species received the designation Woodi in recognition and honour of 
Mr. Wood, late of Richmond, an enthusiastic worker amongst the Limestone fossils 
of his district, and to whom paleontological science is indebted for. many important 
discoveries. 
Formation and locality : Carboniferous Limestone, Richmond, Yorkshire. 
Ex coll, Karl of Enniskillen. 
