330 
ACTINOPTERYGII. 
Rhineastes smithi, E. D. Cope, Proc. Amer. Phil. Hoc. vol. 
(1872), p. 486, and Ann. Rep. IT.S. Geol. Surv. Territ, 
i872 (1873), p. 630, and Vert, Tert, Form. West, Book L 
(1884), p. 64, pi. v. figs. 5-11. — Bridger Eocene; South 
Bitter Creek. [Associated head -hones, &c. ; National 
Museum, Washington.] 
Home indeterminable fragments of ornamented bone, probably 
not ot (his genus, from the Bridger Eocene of Cottonwood Creek, 
Wyoming, are named Rhineastes radulux by E. T). Cope, Ann. Rep. 
F.S. Geol. Hurv. Territ. 1872 (1873), p. 639, and Vert, Tert. Form- 
West, Book I. (1884), p. 67, pi. v. figs. 14-17. 
Genus BUCKLANDIUM, Ivdnig. 
[leones Foss. Sect. 1825, p. 4.] 
A genus known only by the imperfect skull and pectoral arch, 
which closely resemble the corresponding parts of tho existing 
Auchenoglanii 1 of the Nile and West African rivers. Distinguishe 
from the latter by the complete fusion of the cranial roof-bone , 
the larger orbit and frontal fontanelle, and the relatively l flr S er 
pectoral arch, which does not taper below. Head laterally c0 ® 1 
pressed, with rounded tuberculated roof, evidently not covered wi 
skin. 
Bucklandium diluvii, Kbnig. 
1825. Bucklandium diluvii, C. Konig, leones Foss. Sect. p. 4. pB ' 1U ' 
n »-91. _ 1888 
1889. Bucklandium diluvii, A. S. Woodward, Rep. Brit. Assoc. 
p. 679, and Proc. Zool. Soc. 1889, p. 208, pi. xxii. 
Fype. Cranium, &c. ; British Museum. ( . j 
The type species, with cranium about 0 - 12 in length. 
roof strongly arched, ornamented with large, well-separated tu e ^ 
eulations, aud the supraoecipital with a median longitudinal ' ee 
Head probably about as deep as long. 
Form. <)■ Loc. Lower Eocene (London Clay) : Isle of Sheppey • 
P- 9230. Imperfect type specimen, described and figured lot ■ 
1889. History unknown- 
Genus ARIUS, Cuvier & Valenciennes. 
[Hist. Nat. Poiss. vol. xv. 1840, p. 53.] 
Head depressed and bones of cranial roof ornamented an ^ ^ 
posed ; an antero-postcriorly elongated frontal fontanelle , sl P 
Auchenaspis, Bleeker (non Eeerton) : Gunther, Catal. tishes 9r 
vol. t. (1864), p. 137. 
