26 
ICHTHYOTOMI. 
Claclodus vachsmuthi, St. John & Worthen, tom. cit. p. 263, 
pL iii. figs. 1-7.—Kinderhook Limestone ; Iowa. 
Claclodus zygopus, Newberry & Worthen, op. cit. vol. ii. (1866), 
p. 25, pi. i. figs. 9, 10.—Chester Limestone ; Illinois. 
A portion of the skeleton, with the teeth, of a species allied to 
C. mirabilis, from the Carboniferous Limestone of East Kilbride, 
Lanarkshire, has been briefly noticed by R. H. Traquair (Geol. 
Mag. 1888, p. 82), and will be described in the Trans. Geol. Soc. 
Glasgow. 
A fragmentary fossil, apparently the base of a cephalic spine of 
Ho 00 TV pe Hyboclus, from the Rhastic Bone-bed of Aust near Bristol, has been 
b described under the name of Claclodus curtus , J. W. Davis, Quart. 
Journ. Geol. Soc. vol. xxxvii. (1881), p. 424, pi. xxii. fig. 9. 
Genus JDIOEI^TH©lDU’S ? Traquair. 
[Geol. Mag. dec. 3, vol. v. 1888, p. 86.] 
Teeth of the same type as those of Claclodus , but having the 
crown unsymmetrical, consisting of one large cone, with a smaller 
cone on one side only—the latter rarely abseut. 
Dicentrodus bicnspldatns, Traquair. 
1881. Cladodus bicusjridatus, R. H. Traquair, Geol. Mag. [2] vol. viii. 
p. 35. 
1888. Dicentrodus bicuspidatus, R. H. Traquair, loc. cit. [3] vol. v. 
p. 86. 
Type. Detached teeth : Edinburgh Museum. 
Lsual length of tooth from ^ to ^ inch. Base narrow, slightlv 
reniform, gently convex behind, and slightly notched in front at the 
base of the principal cone. Principal cone varying much in slender¬ 
ness, smooth, acutely pointed, sharply carinated on both sides from 
its origin, more or less flexed backwards, and sometimes also 
inclined to one side. 
Form, df Loc. Middle Carboniferous Limestone (Blackband Iron¬ 
stone) : Borough Lee, near Edinburgh. 
P. 2295. Large tooth, one cone being broken away and shown in 
impression (PI. YI. fig. 7). 
Presented by Mrs. Burton , 1882. 
P. 4496. Seven small teeth, two shown in PI. YI. figs. 8, 9. 
Presented by Dr. R. II. Traquair , 1884. 
