1866.1 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. o31 



tlio spines on its upper surface, except tbo nuchal 

 spine, inconspicuous; bead 2J in length; depth about 

 4: D.X— 12. A. 11. Gill-rakers longer and slenderer 

 than in other species ; 15 to 20 developed. Coloration 

 brownish : side with a very distinct dusky bronze 

 bond below the lateral line and parallel with it ; this 

 becoming broken posteriorly into a series of roundish 

 dark spots ; some dark streaks and clouds below this 

 stripe ; fins with dark clouds, the soft dorsal with 

 two dark blotches, which extend as bars on the back ; 

 head with scattered dark spots ; dusky area below 

 eye. 

 «. Pectoral with its rays each crossed by fine black bars, these 

 especially distinct towards the base of the fin; free 

 rays spotted; scales comparatively small, 10-fl-|-23 

 in a vertical line from last dorsal spine to vent ; in- 

 terorbital area broad and almost flat, its width a 

 little more than length of eye; first dorsal spine 

 granulated; second spine 2f in head; pectorals about 



half the length of the body Strigatus, 9 



nn. Pectoral tin with its rays all plain blackish ; free rays 

 plain dusky, scales larger, 8+1+21 in a vertical 

 line from last dorsal spine to vent ; interorbital space 

 more dee])ly concave, its width in adult not quite 

 length of eye; first dorsal. spine nearly smooth; 

 second spine 3 in head; pectorals a little more than 



half of the body Evolans, 10 



mm. [Edge of preorbital with six spinous teeth on each side; 

 cheeks and temples without spine ; pectoral fin 



reaching fourth anal ray.] Miles, U. 



n. Cheek-bone with a spine (small in the adult, larger in the 

 young) at the center of radiation ; temporal ridge 

 with two bluntish spines; bones of the head very 

 sharply striate ; young with four sharp, knife-like 

 spines on side of cheek and snout, in a line before 

 the preocular spine ; these nearly disappearing wuh 

 age ; maxillary about 2J in head ; sides without 

 dark longitudinal stripe. 

 0. Gill-rakers slender in the young, becoming shorter and 

 Thicker with age, about 10 developed on lower part 

 of arch ; head broad, the spines on its upper surface 

 very prominent, all of them more or less compressed 

 and knife-like, especially in the young. Second dor- 

 sal spine 2^ in head; head 2J; depth 4^; D. X-12. 

 A. 11. Pectorals moderate, 2 in body in the adult, 

 2i in the young. Body brownish, much mottled 

 with grayish and dusky, and with throe or four ob- 

 scure dark cross-bands; head and dorsal firs with 

 many dark spots; caudal with two dusky shades ; 

 free rays of pectoral spotted, dusky area below eye. 



Tribulus, 12. 



00. Gill- rakers (in young) long and slender, 5deveIoi)ed; 



scales small ; spines as in P. tribulus, but still larger 



and more knife-like; pectoral fins short, 3 in body 



(in young) Horrens, 13. 



