Stewart.] Cretaceous Fishes, 373 



Length of body to cleft of caudal fin 290 mm. 



Length from anterior extremity to base of dorsal fin 112 " 



Depth of body at dorsal fin 59 " 



Length of pectoral fin 46 " 



Width of pectoral fin at base 16 " 



Length of pelvic fin 29 " 



Width of pelvic fin at base 10 wk 



Length of mandibular rami 32 " 



ENCHODONTIDJE. 



This family may be characterized as comprising fishes with 

 laterally compressed bodies, either naked or covered with scutes. 

 The maxillae and premaxilhr are elongated and covered with 

 small teeth, which are firmly anchylosed to the bone. The den- 

 taries are provided with a single row of large teeth, and usually 

 one or more rows of smaller ones on the external side. Pala- 

 tines and ectopterygoids powerful, and bearing a single series 

 of large teeth on expanded bases. 



It is probable that the only representative of this family in 

 the American Cretaceous is the type genus Enchodus. There 

 are several other European and Asiatic genera belonging to this 

 group of fishes, among which are Eurypliolis, from the Lebanon 

 beds of Syria, Pomognathus , from the Chalk of Europe and Leb- 

 anon, and Ischyrocephalus, from the Upper Cretaceous of West- 

 phalia. 



ENCHODUS. 



. Poiss. FOSS., vol. V, pt. I, p. 64. 

 Leidy, Rep. U. S. Geol. Surv. Terr., I, 1873. p. 289. 



The remains of this genus are constantly met with through- 

 out the Chalk of Kansas, but unfortunately in very fragment- 

 ary condition, consisting for the most part of the palatines and 

 mandibles. The skull, as described by A. S. Woodward, 13 " is tri- 

 angular in form, with the roof flattened and slightly depressed, 

 with the posterior lateral portions sculptured. The premaxilla 

 is thin and deep, while the maxilla is long and slender, with 

 small teeth along the lower border. The palatines, called pre- 

 maxilhr by Cope, are dense masses of bone, with a single large 

 fang extending downward from the anterior extremity. This, 



130. Proc. Geol. Assoc., roL \ 1888), p. 315. 



