Descriptions of New Fossil Fishes from the Trias. 127 

 -XI. — Descriptions of New Fossil Fishes from the Trias. 



By J. S. NEWBERRY. 

 Read April 9, 1878. 



DIPLUEUS, Nov. Gen. 

 Ccelacanth ganoids of large size ; body fusiform ; head high behind, 

 rapidly sloping to muzzle ; cranial bones coarsely granulated ; jugulars 

 long-elliptical, their external surface covered with elongated tubercles ; 

 teeth conical acute. Paired fins lobate ; fin-rays without spines ; caudal 

 fin broad and long ; supplemental caudal relatively large, fan-shaped, dis- 

 tinctly separated from the caudal fin, composed of simple fluted rays, 

 with bulbous bases, and, like those of the other medial fins, articulated 

 throughout about half their length ; scales small, exposed surface coarsely 

 granulated. 



This genus is closely allied to Holophagus, but differs in 

 having the scales granulated, the rays of the median fins 

 without spines, and the fin-rays articulated to a less degree. 

 From Ccelacanthus it may be distinguished by its having granu- 

 lated scales and bones, and fin-rays much more frequently 

 articulated. From Macropoma it differs, in having the scales 

 more distinctly granulated, and in not possessing spines on 

 the fin-rays. 



From the above description it will be seen that this great 

 Triassic fish can not be placed in either of the Ccelacanth 

 genera yet established ; and it becomes necessary to give it a 

 new generic name. It should be said, however, that the 

 resemblance in structure in the whole group of Ccelacanths is 

 so close, that if they had been found in the same formation, 

 they would doubtless have been regarded as different species 

 of the same genus. When the subject can be reviewed in the 

 light of more material, it is not improbable that this conclu- 

 sion will be reached. 



DIPLUEUS LONGICAUDATUS, Newb. 



Fish large, having a length of three feet ; body fusiform ; exterior sur- 

 face of cranial bones coarsely granulated ; jugulars covered with elongated 

 tubercles; dorsal fins large and strong; anterior dorsal supported by a 

 large rounded plate of bone ; paired fins lobate, and, like the anal and the 

 posterior dorsal, based on forked or palmated bones ; caudal fin long and 

 large, with eleven or twelve rays on each side of the vertebral column at the 

 extremity; supplemental caudal fin triangular, three inches in length and 

 in breadth. Scales relatively small, exposed surface coarsely granulated. 



Locality , Boonton, N. J. 



PTYCHOLEPIS MAESHI, Newb. 

 Fish eight inches or more iu length, by two and a quarter in breadth ; 

 fusiform, robust. Head pointed, contained four and a half times in the 



