On the Fossil Fishes of the Carboniferous Limestone Series of Great Britan. 375 
Cladodus striatus, Agassiz. 
(Pl. XLIX., figs. 12, 13.) 
Cladodus striatus—A gassiz, L. 1838. “ Poiss. Foss.,” Vol. IIL, p. 197, pl. 220., fig. 14-17. 
- - Portlock, J. E., 1844. “ Geol. Rept. on Londonderry, &c.,” p. 461. 
s 5 Giebel, C. G., 1848, “Fauna der Vorwelt,” Vol. L., pt. 3., p. 323. 
is 3 Bronn, H. G., 1848. “ Nomencl. Paleont.,” p. 305. 
os 3 Pictet, F. J., 1854. “Traité de Paleont.,” Vol. IT., p. 258. 
- ~ Morris, J., 1854. “Cat. Brit. Foss.,” p. 322. 
5 op M‘Coy, F., 1855. “ Brit. Paleoz. Foss.,” p. 620. 
es > Morris and Roberts, 1862. “Quart. Jour. Geol. Soc. London,” Vol. X VIITI., 
p. 100. 
es 5 Young & Armstrong, 1871. “Trans. Geol. Soc., Glasgow,” Vol. III., Supplement. 
p. 69. 
De Koninck, L. G., 1878. “Fauna du Cale. Carb. dela Belgique.” 
Teeth, base semicircular, large, moderately thick, and undulated at the rounded 
edge with a few obtuse, irregular, radiating furrows below, and obscurely nodose 
above. Width 1 inch to 1:25 inches broad, from middle of flat side to middle of 
convex margin ‘5 inch. In front, the base joins to the crown with a median sinus 
the junction being marked by an overlapping ridge. Crown; median cusp long, 
comparatively slender, moderately compressed, in a few instances slightly sigmoidal 
flexure, in others nearly straight or shehtly curved backwards. Lateral edges 
smooth and sharp ; the anterior and posterior surfaces of the cusp striated more 
closely than in other species, apex smooth and sharply pointed. 
Lateral cones, six or more on each side, of irregular size, but very small, terminal 
ones larger, *2 to ‘3 of an inch long, and ‘1 of an inch wide at the base, pointed out- 
wards, in addition to the secondary cones there is frequently a number of still smaller 
projections interspersed indiscriminately—they are only seen, however, in well 
preserved specimens. 
The distinguishing characters of this species is to be found in the large number 
of small lateral cones or cusps, and the more than usually deeply striated surface of 
the median one. 
The teeth comprised in this species do not bear more than a generic resemblance 
to any of the previously described British species. Three or four species described 
by Messrs. St John and Worthen, from the fish-beds of the Kinderhook Limestone at 
Burlington, Iowa, appear to be similar in form and to possess near relationship with 
them. Amongst the American species, Cladodus wachsmuthi, St. J. and W. 
(‘‘Paleeon. Ill,” Vol. VI., p. 263, pl. 3, figs. 1-7) ; C. succinctus, St. J. and W. (op. 
cit., p. 265, pl. 3, figs. 8-12) ; C. aliernatus, St. J. and W. (op. cit., p. 265, pl 2, figs. 
14-18) ; and C. springer, St. J. and W. (op. cit., p. 259, pl. 2, figs. 1-13), are each 
characterized by a more or less broad base, with a large central cone, and a series of 
smaller lateral cones on each side of it. The lateral cones, however, in each species 
are much longer than those of C. striatus, as well as being either angular or compressed 
TRANS. ROY. DUB. SOC., N.S.. VOL, I. 3P 
