ENCHODOXTID^. 
221 
Genus CIMQLICHTHY3, Leidy. 
[Trans. Amer. Phil. Soc. v(^ xi. 1857, p. 95.] 
Syn. (?) Plinthophorus, A. Gunther, Geol. Mag. vol. i. 1864, p. 115. 
Empo, E. D. Cope, Proc. Amer. Phil. Soc. vol. xii. 1872, p. 847. 
Trunk elongate-fusiform. Cranium as in Enchodus. Premaxilla 
in the form of a vertical lamina, externally ornamented, and either 
toothless or vrith a series of minute teeth; maxilla long and styli- 
form, similarly either toothless or with minute teeth where it 
enters the oral margin; ectopterygoid bearing a single spaced 
series of acute, laterally-compressed teeth, which are largest in 
front and sometimes exhibit a single posterior barb towards their 
apex ; palatine with a double longitudinal series of teeth, none 
barbed, the largest behind ; dentary thin, but so bent that it has a 
wide horizontal extent, with a close series of minute teeth on its 
extreme outer margin, another close series of larger teeth withiii 
this, and a third inner series of relatively large recurved teeth, well 
spaced, and not barbed at the apex. Operculum strengthened on 
the inner side by a ridge extending horizontally backwards from 
the point of suspension. Vertebrae from 50 to 60 in number, about 
half being caudal; the centra at least as long as deep, much 
constricted, and marked with fine irregular longitudinal ridges. 
A series of large dermal scutes along the dorsal ridge between the 
occiput and the dorsal fin; smaller scutes along the course of the 
lateral line. 
One specimen of the trunk hypothetically ascribed to the so- 
ealled Empo exhibits three longitudinal series of rhombic scutes on 
the fiank of the abdominal region. Their “ apices are directed 
forwards, and the surface has a reticulate sculpture. In another 
species they appear to be smooth” (^Cope). There is no certain 
evidence of intervening scales. 
Cimolichthys lewesiensis^ Leidy. 
1835-44. Saurodon leanus, L. Agassiz, Poiss. Foss., Feuill. p. 55, and 
vol. V. pt. i. p. 102, pi. XXV c. figs. 30, 31 {errore). 
1850. Saurodon leanus, F. Dixon, Geol. Sussex, p. 373, pi. xxx. 
figs. 28, 29, pi. xxxii *. fig. 10 {errore). 
1857. Cimolichthys levesiensis, J. Leidy, Trans. Amer. Phil. Soc. 
vol. xi. p. 95. 
1878. Cimolichthys levesiensis, £. T. Newton, Quart. Journ. Geol. Soc. 
vol. xxxiv. p. 795. 
1888. Cimolichthys levesiensis, A. S. Woodward, Proc. Geol. Assoc, 
vol. X. p. 316. 
