160 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
1889. The AIbatross secured specimens at Honolulu, Laysan Island, and at station 3834, on the southern 
coast of Molokai, in 8 fathoms. Our specimens range from 4 to 6.5 inches in length. 
Holocentrus diadema LaccpMe, Hist. Nat. Poiss., IV, 335, 372, 374, pi. 32, tig. 3, 1802, South Seas; Fowler, Proc. Ac. Nat. Sei. 
Phila. 1900, 501 (Hawaiian Islands); Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (Sept. 23, 1903), 440 (Honolulu); 
Snyder, op. cit. (Jan. 19, 1904), 523 (Honolulu; Laysan Island; Albatross Station 3834). 
Perea pulcliella Bennett, Zool. Joum., Ill, 377, pi. 9, fig. 3, 1827, Sumatra. 
Holoeentrum diadema, Cuvier & Valenciennes, Hist. Nat. Poiss., Ill, 213, 1829 (lie de France; Timor; Borabora; Society 
Islands); Gunther. Fischc der Siidsee, 97, 1873 (Samoa; Tahiti; Tonga; Hawaiian Islands); Steindachner, Denks. 
Ak. Wiss. Wien, LXX, 492, 1900 (Honolulu; Laysan). 
115. Holocentrus microstomus Gunther. Fig. 58. 
Head 3 in length; depth 3; eye 2.75 in head; snout 4; maxillary 2.7; interorbital 5; D. xi, 14; 
A. iv, 10; P. i, 14; V. i, 7; scales 4-48-8. 
Body elongate, compressed, greatest depth about ventral fin, upper and lower profiles evenly 
convex; head compressed, longer than deep, and pointed, its width a little less than half its length; 
upper profile of head slightly convex; eye very large, impinging upon upper profile, the posterior 
margin of pupil nearly midway in length of head, and a little less than postocular reg on; mouth 
Fin. 58 . — Holocentrus microstnmus Gunther; after Gilnther. 
small, slightly oblique; maxillary reaching a little beyond anterior margin of pupil, small, its distal 
expanded extremity 1.25 in pupil; teeth minute, crowded; tongue pointed, free; , suborbital rim very 
narrow, finely serrate; lips thick, fleshy; nostrils close together, anterior very large, close to eye; 
bones on head all finely serrate, the opercle with two well-developed spines, the upper the longer; 
preopercle with a strong spine reaching beyond gill-opening; gill-opening large, filaments rather long, 
gillrakers compressed, short, in moderate number; pseudobranchiie large; dorsal spines sharp, pointed, 
first 3 in head, second 2.3, third 2, eleventh 6; anterior dorsal rays elongate, fourth 2 in head, last 5; 
soft anal similar to soft dorsal, last ray 5; caudal small, forked, lobes pointed; pectoral small, 1.6 in 
head; ventral reaching three-fohrths distance to anus, fin 1.4 in head, spine 2; caudal peduncle 
elongate, its length 1.19, its depth 3.9. 
Color in alcohol (No. 03486) pale silvery brown or whitish, side with 9 or 10 narrow white longi¬ 
tudinal lines; axil of pectoral brown; spinous dorsal pale, with a broad blackish band from middle of 
membrane between first 2 spines, edged above and below with whitish in front; fins pale or whitish. 
Described from an example (No. 04263) taken at Honolulu. 
We have examined 2 other specimens obtained at Honolulu by Dr. Wood and recorded by Dr. 
Jenkins. They range from 5.5 to 6.2 inches in length. The species is common at Samoa. 
