190 
ACTINOPTERYGir. 
Dorsal Hn in front of anal; a postclaTicular 
plate . 
Dorsal fin opposed to part of much-extended 
anal; no postclavicular plate. 
TI. No enlarged palatine tooth. 
Palatine teeth in one longitudinal series ; 
no teeth barbed : no scutes, but minute 
scales . 
Palatine teeth in two longitudinal series ; 
some ectopterygoid teeth semibarbed ; 
dermal scutes present, but not deepened 
on flank . 
One much-deepened series of scutes on 
flank, supporting lateral line. 
As Frionolepis, but with small upper and 
lower lateral scutes. 
Large teeth at mandibular symphysis; 
median dorsal scutes but apparently 
no others. 
Eurypholis (p. 207). 
Palceolycus (p. 211). 
Halec (p. 212). 
CimGlichthys (p. 221.) 
Prionolepis (p. 229). 
Leptecodon (p. 233). 
Pantopholis (p, 234). 
Genus KIMCHODUS, Agassiz. 
[Poiss. Poss., FeuiU. 1835, p. 55, and vol. v. pt. i. 1844, p. 64.] 
Syn. Isodus, J. J. Heckel, in Ilussc^ger’s Peisen, vol. ii. pt. iii. 1849, 
p.. 342. 
Phasyanodus, J. Leidy, Proc. Acad. Nat. Sci. Philad. 1857, p. 167. 
Ischyrocephalus, W. von der Marck, Zeitschr. deutsch. geol. 
Ges. vol. X. 1858, p. 248. 
(?) Teiheodus, E. D. Cope, Bull. U.S. Geol. Surv. Territ. no. 2, 
1874, p. 43. 
Solenodoti, D. G. Kramberger (jioii Brandt, 1833), Jahrb. k.-k. 
geol. Ileichsanst. vol. xxxi. 1881, p. 373. 
Holcodoti, D. G. Kramberger, Bad Jugoslav. Akad. vol. Ixxii. 
1885, p. 18. 
Eiirygnathus^ J. W. Davis, Trans. Boy. Dublin Soc. [2] vol. iii. 
1887, p. 601. 
Trunk elongate-fusiform, both this and the head laterally com¬ 
pressed. Cranial roof exhibiting a deep median longitudinal 
depression, its lateral and occipital margins ornamented, like the 
other external bones, with ridges and tubercles of ganoine. 
Mandible a little prominent, provided with an inner widely-spaced 
series of large slender teeth, the largest in front, also a marginal 
series of minute teeth, all nearly or completely solid : premaxilla in 
the form of a vertical lamina, deepest in front, tapering behind, and 
with a single spaced series of small teeth ; maxilla long and slender, 
either finely toothed or toothless at the oral border; palatine 
