1870.] 



567 



[Cope, 



Description, — Radii, D. I. 7, A. 6, P. I. 6, V. T. 5. Two rows of plates 

 of the lateral line to a little behind the anal fin ; then one row. Trans- 

 verse series 24 to caudal. Three plates between occiput aiid dorsal fin. 



Fourteen plates across dorsal line behind dorsal fin. Sutures of vertex 

 obliterated, but those on each side of the suture rising from the middle of 

 the orbit are of equal width. Three plates along each canthus rostralis, 

 with a median rostral. Temporal region rugose. Sides and muzzle 

 below, with close, card-like spinules. Plates everywhere comb-like 

 behind. Spines and outer radii of all the fins, spinulose. The pectoral 

 spine is, in addition, serrate on the inner margins. 



Length of head to occiput 3.5 times in total less caudalis ; widtli behind 

 pectorals five times, and depth at dorsal 7.5 times in the same. Orbit 

 round, one-third of interorbita] width. Pectorals to middle of ventrals ; 

 ventrals to beyond vent, but not to anal fin. Basis of dorsal twice to 

 adipose spine (!), which is small, articulating in a groove in the summit of 

 the interhfemal bone, which appears between the shields. First dorsal 

 ray weak, jointed distally. 



Interoperculum very large, entirely inferior. Thoracic bones covered 

 with rugosities, separated externally. Three rows of abdominal plates, 

 foiir in the first cross-row. 



The lobes of the caucjal fin are acute and nearly equal. Length four 

 inches. Color olive, top of head and dorsal region darker. A black spot 

 in the middle of the caudal fin. 



