88 



U.S. NATIONAL MUSEUM BULLETIN 2 02 



Vol. 3 



1.73(1.49 to 1.54); length of dorsal fin base 0.88(0.9 to 1.0); length 

 of anal base 1.07(1.08 to 1.22); length of dorsal spine 0.98(1.0 to 1.1); 

 all in length of head. Angle of snout profile 38(36) degrees, snout 

 profile concave. 



Interorbital area elevated, rounded; mouth terminal; dorsal spine 

 bent at base bearing on posterior lateral edges, 2 rows of long strong 

 spines, 10 to 15 spines per row, pointing outward and bent downward; 

 pelvic spine moveable at tip, with about 18 outwardly directed 

 spinules around tip; pelvic flap moderately developed, scales of sides 

 \vith 6 or 7 small spines, connected basally, middle one longest, 

 elongated, directed posteriorly with tips curved anteriorly on caudal 

 peduncle; soft dorsal fin rays low, scarcely elevated anteriorly; caudal 

 fin rounded, fan-shaped. 



li^tU^^" 



Figure 153. — Peroagor melanocephalus johnstonensis, new subspecies, holotype, USNM 

 140670 from Johnston Island. Drawn by A. M. Awl. 



Color.—lvi. alcohol, ground color of head and body dark blackish 

 brown, lighter along ventral edge, posterior third of body, and caudal 

 peduncle ; lips black ; branchial cleft and surrounding area of s ime color 

 intensity as head and body or nearly so, not forming a definite spot as 

 in P.m. melanocephalus; margin of ventral flap pale with narrow black 

 submarginal line; dorsal spine dark brown, tip of spinules white, its 

 membrane uniform dark brown or spotted with dark brown; soft 

 dorsal and anal fin membranes with 8 to 10 narrow wavy lengthwise 

 brown lines, rays light brown; caudal fin with 2 to 4 distinct broken 



