330 
ACTINOPTEKYGII. 
RJlineastes smithi, E. D. Cope, Proc. Amer. Phil. Soc. vol. xii. 
(1872), p. 486, and Ann. Eep. IJ.S. Geol. Surv. Territ. 
1872 (1873), p. 639, and Yert. Tert. Form. West, Book I. 
(1884), p. 64, pi. V. figs. 5-11.—Bridger Eocene ; South 
Bitter Creek. [Associated head-bones, &c. ; National 
Museum, Washington.] 
Some indeterminable fragments of ornamented bone, probably 
not of this genus, from the Bridger Eocene of Cottonwood Creek, 
Wyoming, are named Rhineastes radulm by E. D. Cope, Ann. Eep. 
E.S. Geol. Surv. Territ. 1872 (1873), p. 639, and Yert. Tert. Form. 
West, Book I. (1884), p. 67, pi. v. figs. 14-17. 
Genus BUCKLANDIUM, Kdnig. 
[leones Foss. Sect. 1825, p. 4.] 
A genus known only by the imperfect skull and pectoral arch, 
which closely resemble the corresponding parts of the existing 
Auchenoglanis ^ of the Nile and West African rivers. Distinguished 
from the latter by the complete fusion of the cranial roof-bones, 
the larger orbit and frontal fontanelle, and the relatively larger 
pectoral arch, which does not taper below. Head laterally com¬ 
pressed, with rounded tuberculated roof, evidently not covered with 
skin. 
Boicklandium diluvii^ Xonig. 
1825. Buddandiwn diluvii, C. Konig, leones Foss. Sect. p. 4, pi. viii. 
no. 91. 
1889. Bucklandium diluvii^ A. S. Woodward, Eep. Brit. Assoc. 1888, 
p. 679, and Proc. Zool. Soc. 1889, p. 208, pi. xxii. 
Type. Cranium, &c.; British Museum. 
The type species, with cranium about O’12 in length. Cranial 
roof strongly arched, ornamented with large, well-separated tuber- 
culations, and the supraoecipital with a median longitudinal keel. 
Head probably about as deep as long. 
Form. ^ Log. Lower Eocene (London Clay); Isle of Sheppey. 
P. 9230. Imperfect type specimen, described and figured loc. cit. 
1889. History unknown. 
les. ^ 
Genus ARIUS, Cuvier & Yalenciennes. 
[Hist. Nat. Poiss. vol. xv. 1840, p. 53.j 
Head depressed and bones of cranial roof ornamented and ex-'^^ 
posed; an antero-posteriorly elongated frontal fontaneUe; supra- 
^ Auchenaspis, Bleeker {non Egerton): Gunther, Catal. Fishes Brit. Mus. 
vol. V. (1864), p. 137. 
