THE STATE GEOLOGIST. 101 



No indications of this species have yet been discovered in New 

 Jersey. The dozen or so examples which have been obtained were 

 all derived from the Newark series of Durham, Connecticut. 



Order CROSSOPTRRYGH. 



Family COELACANTHID^. 



Body deeply and irregularly fusiform, with cycloidal, deeply 

 overlapping scales, more or less ornamented with ganoine. 

 Branchiostegal apparatus between the mandibular rami consist- 

 ing of a pair of large gular plates. Paired fins obtusely lobate; 

 two dorsal fins, the anterior without baseosts, the posterior dor- 

 sal and the anal with baseosts, obtusely lobate. Axial skeleton 

 extending to the extremity of the caudal fin, usually projecting 

 and terminated by a small supplementary caudal. Air-bladder 

 ossified. 



Genus Dipujrus Newberry. 



Supplementary caudal fin prominent, with much elongated 

 pedicle; fin-rays robust, closely articulated in the distal half; pre- 

 axial rays of the first dorsal and caudal fins with spinous 

 tubercles. Scales and head-bones irregularly striated. 



Dipluras longicaudahis Newberry. 



1878. Diplurus longicaudatus, J. S. Newberry, Ann. N. Y. Acad. Sci., vol. i., 



p. 127. 

 1888. Diplurus longicaudatus, J. S. Newberry, Monogr. U. S. Geol. Surv., 



vol. xiv., p. 74, pi. xx. 



The type and only known species, attaining a total length of 

 about 70 cm. to the tip of the supplementary caudal fin, and maxi- 

 mum depth of trunk of about 20 cm. Anterior dorsal fin strong, 

 supported by a single large laminar axonost ; the lobate posterior 

 dorsal nearly opposite the anal, and corresponding to' it in form 

 and size; caudal fin much elongated, and separated from the 

 supplementary caudal by a distinct interval; paired fins obtusely 

 lobate; scales large cycloidal, and deeply overlapping; the ex- 



