ioo ANNUAL REPORT OF 



This species is not represented in New Jersey, being confined, 

 so far as known, to the Triassic Coal-field of Virginia. 



Family EUGNATHID^. 



Trunk fusiform or elongate, not much laterally compressed. 

 Cranial and facial bones moderately robust, externally enameled, 

 and opercular apparatus complete ; gape of mouth wide, snout not 

 produced, marginal teeth conical, and larger than the inner teeth. 

 Fin-rays robust, articulated, and distally divided fulcra con- 

 spicuous. Dorsal fin short and acuminate. Scales rhombic, 

 sometimes with rounded posterior angles. 



Genus Ptycholepis Agassiz. 



Trunk elegantly fusiform; snout acutely pointed and promi- 

 nent; external bones highly ornamented with prominent ridges; 

 marginal teeth very small and regular; dorsal fin in advance of 

 anal, caudal fin forked; scales all narrow and elongate, marked 

 with deep longitudinal grooves. Fulcra biserial, conspicuous on 

 all the fins excepting the dorsal. 



Ptycholepis marshi Newberry. 



1878. Ptycholepis marshi, J. S. Newberry, Ann. N. Y. Acad. Sci., vol. i., p. 



127. 

 1888. Ptycholepis marshi, J. S. Newberry, Monogr. U. S. Geol. Surv., vol. 



xiv., p. 66, pi. xix., Figs. 1, 2. 

 1895. Ptycholepis marshi, A. S. Woodward, Cat. Foss. Fishes Brit. Museum, 



pt. iii., p. 324. 



A species of slender proportions, attaining a length of about 

 20 cm. Head with opercular apparatus occupying somewhat less 

 than one-fourth the total length of the fish. Ornamental rugse 

 of cranial roof slightly radiating; those of the facial and oper- 

 cular bones more or less parallel and forked. Dorsal fin far 

 forwards, and pelvic fins arising opposite its hinder extremity. 

 Scales exhibiting only longitudinal ridges and furrows, and the 

 hinder border often deeply serrated. (Woodward). 



