298 PROCEEO'INGS OF THE NATIONAL MUSEiUM vol.94 



distance from eye to bony edge of nostril 6.50 (6.82; 6.44; 6.56; 5.16); 

 longest spine of intcropercle 15.5 (16.4; 16.4; 13.1; — ); diameter of 

 eye 3.87 (4.34; 4.50; 4.52; 5.11); length of ramus of lower jaw 12.9 

 (12.7; 13.9; 13.1; 10.7) ; gi^eatest width of lower lip 10.1 (9.92; 10.7 

 1 1 .8 ; 1 1 .6) ; length of caudal peduncle (distance from base of last anal ray 

 to base of midcaudal fin rays) 25.5 (24.0; 27.7; 25.1 ; 28.4) ; least depth 

 of caudal peduncle 7.60 (6.66; 6.83; 7.02; 6.05); length of depressed 

 dorsal 32.8 (33.3; 33.4; 32.2; 29.3); length of depressed anal 7.74 

 (7.75; 6.83; 8.47; 11.6); length of base of dorsal fin 23.5 (24.8; 25.6; 

 24.5; 22.8); length of dorsal spine 22.6 (22.6; 22.5; 23.8; 19.5); length 

 of adipose spme 12.7 (12.1; 12.9; 11.2; 9.77); length of pectoral spine 

 31.0 (31.0; 27.3; 28.5; 25.6); length of pelvic spine 27.1 (27.3; 24.6; 

 26.9; 22.8); length of upper ray of caudal fin 19.7 (19.1; 20.5; 22.2; 

 25.6); length of lower ray of caudal fin 29.7 (28.4; 33.2; 33.3; 35.3); 

 distance from snout to origin of dorsal fin 47.8 (48.8; 46.9; 51.2; 

 44.2) ; snout to origin of adipose fin 78.0 (77.5; 78.5; 77.6; 74.0) ; snout 

 to origin of anal fin 68.2 (71.0; 70.8; 69.8; 61.4); snout to insertion of 

 pelvic fin 53.4 (55.2; 53.2; 55.5; 51.2). 



The following counts were made, respectively: Dorsal rays I, 8 

 (I, 8; I, 8; I, 8; I, 8); anal I, 5 (L 5; I, 5; I, 5; I, 5); pectoral I, 6 

 (I, 6; I, 6; I, 6; I, 6); pelvic I, 5 (I, 5; I, 5; I, 5; I, 5); number of 

 scutes in lower lateral series 24 (24; 24; 24; 25); plates from dorsal 

 to origm of adipose 3 (3; 3; 3; 3) ; plates from base of anal to base of 

 midcaudal fin ra^^s 11 (11; 11; 10; 11); plates in front of dorsal fin 

 always 3; spines on interopercle about 20 (23; 16; 19; undeveloped); 

 for additional counts see table 17. 



This species is greatly depressed forward; the greatest depth at 

 front of dorsal is about twice the least depth of the caudal peduncle, 

 one-half length of snout, and 2% in width at base of pectorals; prickles 

 on head completely covering the snout; interorbital space flat, rims 

 of orbits a trifle elevated on large males, the area from eye to nostrils 

 strongly convex; supraoccipital plate bordered posteriorly by the 

 pair of plates at its outer edges, and in the midline by a median plate, 

 which has a median suture; the posterior tip of the supraoccipital 

 plate is fleshy; strong spines occur on the upper surfaces of the 

 pectoral spine in mature males; the interopercular spines are grad- 

 uated in length evenly from the front of the bony elements to the 

 most posterior spine, which is longest; all have hooked tips except the 

 shortest ones; on the fully mature males, there is along the upper 

 surface of each ray an elongate dermal flap, the one on the pelvic 

 spine widest and a little more than diameter of eye; cross section 

 of the caudal peduncle would show it to be triangular in shape, the 

 ventral surface flat; the scutes along the lower lateral series pos- 

 teriorly are keeled; adipose fin well developed; anal fin small, the 

 anal spine weak and without prickles as in the other fins. 



