Genus PAL^EONISCUS, DeBlainv. 

 Pal^eoniscus peltigekus, Newb. 



Elonichthys peltigerus, N. Proc. Phil. Acad. Sciences, April, 185G. 



Fig. 1. 



Palxoniscus peltigerus. 



Body short, compressed; length 5 inches; height 1 inch, 4 

 lines; enameled surface of cranial bones covered with small, 

 thickly set tubercles; opercula and hyoid plates ornamented by 

 parallel convolutions of thread lines; scales all covered with 

 similar raised lines, which cross them diagonally downward 

 and backward, terminating in serrations of the posterior mar- 

 gin. About the middle of the interval between the occiput 

 and dorsal fin, on the median line, begins a row of large, oval, 

 ornamented scales, extending to the dorsal fin. Behind the 

 dorsal is a similar row, transformed into large striated fulcra, 

 which overlie the prolongation of the vertebral column to its 

 termination. 



