1919.] NATURAL SCIENCES OF PHILADELPHIA. 209 



and later the head of the Servigo Geologico e Mineralogico do- 

 Brazil at Rio de Janeiro. The type of Ennelichthys derhyi, No. 55, 

 is a head about 6 inches long, the left side somewhat crushed down, 

 the right side intact, but moi-e or less battered, especially posteriorly. 

 Opercle battered, the subopercle not evident; bones of top of head 

 rugose; preopercle broad, with radiating striae at angle; cheek 

 covered by a large bone; two bones behind eye. 



Mouth very large, very oblique, the lower jaw projecting; snout 

 very short, about 5f in head; eye 5 in he£id; maxillary 2i, man- 

 diljle about 2. Both jaws with, long, sharp, fang-like teeth anter- 

 iorly, the longest in front of lower jaw about I to ^ diameter of eye, 

 the next longest on sides of mandible, about 8 of these evident. 

 Posterior teeth of both jaws rather smaller, and the upper teeth ap- 

 parently smaller, than lower and more widely set, but no small teeth 

 and no broad teeth visible anywhere. A pit filled with stone on 

 each side corresponding to the nostril. While most of the teeth 

 are lost, fang-like teeth are seen at intervals in both jaws. 



BRANNERION new genus. 



Type: Calmnopleurus vestitus Jordan and Branner. 



The species described by Jordan and Branner under the name of 

 Calamopleurus vestitus, should form the type of a distinct genus of 

 Elopidse, distinguished by the long anal fin which begins under the 

 last ray of the dorsal, and the deep short body with correspondingly 

 long ribs. The scales are large, but of the same character as in 

 Calamopleurus, and the lateral line is well developed. 



The genera of Brazilian Cretaceous Elopidse may be thus compared 



with the living genera: 



a. Eloping: Pseudobranchiae large (in living species) scales 

 relatively small; last ray of dorsal not prolonged; anal 

 smaller than dorsal ; base of caudal more or less scaly, 

 b. Dentition even, the teeth slender and close-set; dorsal with 

 a sheath of scales, 

 d. Anal fin long, beginning under last rays of dorsal, its raj^s 

 15 or more; ventrals below or before dorsal; scales rather 

 large, 20 in a cross series below dorsal; lateral line well 

 developed. (Teeth unknown). Brannerion. 



dd. Anal fin short, beginning well behind dorsal, 

 e. Ventrals inserted under last rays of dorsal. 



f. Body compressed; subopercle nearly as large as op- 

 ercle; scales small, about 35 in a cross series; lat- 

 eral hne well developed in perfect specimens (obso- 

 lete in those poorly preserved). Calamopleurus^ 



