PALiEOXISCIDiE. 
487 
Acad. Sci. vol. vii. (1888), p. 179. The type species is very large 
and described thus :— 
Actinojpliorus clnrlci , J. S. Newberry, ibid. p. 179, and Palaeoz. 
Pishes N. America (lion. U. 8. Geol. Surv. no. xvi. 1889), 
p. 175, pi. xlix. fig. 1.—Cleveland Shale (Lower Carboni¬ 
ferous) ; Cuyahoga Co., Ohio. [Anterior portion of fish; 
Columbia College, New York.] 
Genus ELONICHTHYS, Giebel. ^ - 
[Fauna der Yorwelt, Pische, 1848, p. 249.] 
Syn. (?) Propalceoniscus, A. Pomel, Catal. Method. Vert. Poss. 1853 
p. 133. 
Hhcibdolepis } F. H. Troschel, Verhandl. naturh. Yerein. preuss. 
Rhein], u. Westphal. 1857, p. 15. 
(?) Gcinacrodus, R. Owen, Trans. Odontol. Soc. vol. v. 1867, 
p. 349. 
Cosmoptychius, R. H. Traquair, Quart. Journ. Geol. Soc. 
vol. xxxiii. 1877, p. 553, 
Trunk more or less deeply fusiform. Mandibular suspensorium 
very oblique; jaws stout and teeth acutely conical, arranged in two 
series an inner row of well-spaced laniaries and an outer row of 
numerous, closely arranged small teeth ; bones of head and opercular 
apparatus ornamented with tuberculatiojis and striae. Pins large, 
with fulcra, the rays branching distally, covered with ganoine, and 
the more robust sculptured. Pectoral, pelvic, dorsal, and anal fins 
triangular, acuminate; pectoral fin-rays articulated; pelvic fins 
with short base-line; dorsal opposed to space between the pelvic 
and anal fins; upper caudal lobe much produced, the fin deeply 
forked and inequilobate. Scales of moderate thickness, very 
slightly imbricating, covered with ganoine more or less sculptured; 
ridge-scales immediately in advance of median fins much enlarged. 
In the amended definition of this genus by Traquair (Ganoid 
Pishes Brit. Carb. Form. 1877, p. 47), the true interoperculum 
(“ suboperculum ”) is stated to be absent. This element, however, 
has subsequently been discovered as a small triangular bone 
(Traquair, Proc. Roy. Soc. Edinb. vol. xvii. 1890, p. 397). 
Slonichthys germari^ Giebel. 
1848. ElcnicJithys germari, C. G. Giebel, Fauna der Vorwelt Fische 
p. 250. 
