18 
ICHTKYOIOMI. 
vary; and teeth of this form may thus be provisionally 
placed with C. mirabilis. Purchased , 1860. 
P. 1319 a. Fragment of similar tooth, from the “ Black Rock,” 
labelled by Agassiz C. mirabilis. Egerton Coll. 
34973. An imperfect tooth, the denticles unusually numerous and 
slender; Bristol. Purchased , 1860. 
P. 2952. Base of a large and a small tooth; Bristol. 
Enniskillen Coll. 
P. 1319, P. 2919. Group of much broken small teeth in limestone, 
hearing Agassiz’s MS. label; Bristol. 
Egerton df Enniskillen Colls. 
36465. Two imperfect small teeth, one figured in Quart. Journ. 
Geol. Soc. vol. xviii. pi. iii. fig. 6; Oreton, Shropshire. 
Presented by G. E. Poberts , Esg., 1862. 
42216. Seven imperfect teeth; Oreton. Baugh Coll. 
46821. Small tooth ; Derbyshire. Gilbertson Coll. 
P. 5360. Three imperfect teeth, detached from matrix; Ticknall, S. 
Derbyshire. Wilson Coll. 
P. 4893. Four teeth; Wensleydale, Yorkshire. Horne Coll. 
49628. Abraded and broken tooth, apparently of this species; 
Richmond, Yorkshire. Purchased , 1878. 
Cladodus marginatus, Agassiz. 
1843. Cladodus marginatus, L. Agassiz, Poiss. Foss. vol. iii. p. 198, 
pi. 22 b. figs. 18-20. 
1843. Cladodus acutus , L. Agassiz, tom. cit. p. 199, pi. 22 b. fig. 21. 
1848. Cladodus loevis , F. McCoy, Ann. & Mag. Nat. Hist. [2] vol. ii. 
p. 133. 
1855. Cladodus Icevis, F. McCoy, Brit. Falseoz. Foss. p. 619, pi. 3 k. 
fig- 5- 
1855. Cladodus mirabilis , F. McCoy, op. cit. p. 619 (in part). 
1883. Cladodus marginatus , J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. i. p. 373, pi. xlix. figs. 7-9. 
1883. Cladodus conicus , J. W. Davis, torn. cit. p. 564, pi. xlix. fig. 6. 
1883. CJadodus acutus , J. W. Davis, tom. cit. p. 377, pi. xlix. fig. 17. 
Type, Detached teeth ; Geological Society of London. 
Teeth robust, the crown consisting of a median principal cone, and 
not more than two lateral cones on each side. The cones are much 
compressed, with sharp lateral edges; except when worn, they are 
marked by few small irregular, sharp striae. The apex of the 
