100 
ACTINOPTEKyGII. 
Phil. SoC ' 
Ichthyodectes ctenodon, Cope. 
1871. Ichthyodectes ctenodon, E. I). Cope, Proc. Arner. 
vol. xi. p. 586. 
1872. Ichthyodectes ctenodon, E. 1). Cope, i bid, vol. xii. p. •‘540. 
1875. Ichthyodectes ctenodon, E. D. Cope, Vert. Cret. Form. " 
■ Q J 1; T C P’ U - S - Ge °l. Srn-v. Territ. vol. ii.), p. 207, pi. xlvi. figs- 1 \ 
190°. Ichthyodectes ctenodon, F. B. Loomis, Palreontogr. vol. xl " 
P- 244, pi. xxiii. figs. 7, 8. 
^ 8S0C ' a ^ maxillary and dentary bones, &c. 
e type species, with maxilla attaining a length of about 0 
Oral border of maxilla straight, with about 40 alveoli; that o 
entarj slightly concave, with nearly 30 alveoli. Depth of den a 
at symphysis about ono third the total length of the mandibu 0 
ramus, Teeth small, slender and smooth, with the apex turner 
little inwards. 
Form. £ Loc. Upper Cretaceous (Niobrara Group) : Smoky IllU ’ 
Kansas, U.S.A. 
Not represented in the Collection. 
Ichthyodectes anaides, Cope. 
1872. Ichthyodectes anaides, E. D. Cope, Proc. Amer. Phil. Soc. vol. xm 
p. 339. 
1875. Ichthyodectes anaides, E. D. Cope, Vert. Cret. Form. "West (B®P- 
U.S. Geol. Surv. Territ. vol. ii.), p. 200, pi. xliv. fig 8 - ’ 
pi. xlv. figs. 1-8. 
1892. Ichthyodectes anaides, A. R. Crook, Palmontogr. vol. xsX 
P-111, pl- xv. . 
1900. Ichthyodectes anaides, F. B. Loomis, Palmontogr. vol. xlv • 
p. 244. 
Type. Remains of skeleton, including mandible and preroaxiU fl ^ 
The largest known species, the mandible attaining a length 0 
about 0-18. Oral border of dentary slightly sinuous, with _ 
convexities, and not prominent at the symphysis ; its depth a 
symphysis about equal to one third the total length of the man- 
dibular ramus; its outer face gently sinuous, not sharply hen 
ndged ; teeth small and smooth hut stout, with the apex curve 
inwards. I remaxilla a deep ovoid, very convex on the outci 
inning laterally and above: teeth five in number, resem 1 ° 
those of the dentary. Maxilla a little deepened in front, and th 
01 a jorder gently sinuous, with one median convexity; hs *■*’ 
smaller than those of the premaxilla, and the dental sockets abo 
40 in number. 
Form, if Loc. Upper Cretaceous (Niobrara Group) : Smoky && 
Kansas. 
