322 Mr.'T. Atthey on the Palatal Teeth of a Climaxodus. 
denticulated margin. The narrow portion of the surface is 
ornamented with minute granulations; the broad furrow is 
striated in the direction of the length of the tooth. Three of 
the teeth are somewhat shorter than the rest; or, in other words, 
they have a more circular form. 
The largest tooth measures, including the projecting bony 
process, an inch and a quarter in length, and 1s about seven- 
eighths of an inch wide in the broadest part. The smallest 
tooth is rather more than three-eighths of an inch long, and 
very nearly the same in the broadest part. In the small spe- 
cimens the groove at the broad end is nearly as large as the 
remaining portion of the tooth. 
On comparing these teeth with the figure given by M‘Coy 
(British Paleozoic Fossils, pl. 3G. £5) of his Climaxodus 
imbricatus, they are found to agree in having the narrow por- 
tion of the tooth ornamented with transverse ridges; but a 
further comparison cannot at present be made, as the figure 
given by M‘Coy was from a specimen broken. at both ends. 
s it appears to be advisable to attach some name to this 
interesting fossil, and seeing that it agrees in some essential 
points with the genus Climaxodus, M‘Coy, I propose to refer 
it provisionally to that genus, and, further, to distinguish the 
species which I have found at Newsham by the name of Cli- 
maxodus lingueformis. 
Also Lavail myself of the present occasion to announce that, 
in addition to Climaxodus and the species already described 
in former communications to the ‘Annals,’ several other im- 
teresting forms have been obtained from the shale of the Low- 
main seam, of which no notice has been given, the most im- 
portant of these being the following :— 
Caclacanthus lepturus, Ag. 
Several entire specimens have occurred, but usually in a 
much disturbed state. Separate scales are not uncommon. 
Strepsodus sauroides, Huxl. 
Two or three jaws of this species, with the teeth attached, 
have been obtained, and numerous separate teeth. 
Gyrolepis Rankinti, Ag. 
Several specimens have occurred in a more or less complete 
state of preservation. 
Platysomus parvulus (young ?). 
A few entire specimens have occurred. 
