FAMILY POMACENTRIDAE — WOODS AND SCHTJLTZ 115 



line and origin of anal; upper part of lateral line with 14 or 15 (14 to 

 16) tubular scales; gill rakers 6 + 1 + 14 (1 paratype). 



Depth of body 2.1 (2.08 to 2.1); length of head 3.16 (3.0 to 3.2); 

 both in standard length. Snout 4.57 (4.3 to 4.6); eye 2.65 (2.4 to 

 2.7); preorbital width 13.5 (12.5 to 13.8); length of upper jaw 3.17 

 (3.0 to 3.2); postorbital part of head (hind margin of eye to upper 

 edge of gill opening) 2.72 (2.7 to 3.2); interorbital width 3.57 (3.9); 

 depth of caudal peduncle 2.08 (1.95 to 2.1); length of pectoral fin 1.07 

 (1.0 to 2.6), of pelvic fin 0.93 (0.9 to 0.94), of 6th dorsal spine 2.08 

 (1.8 to 2.0), of upper caudal rays 0.91 (0.9 to 1.0), of lower caudal 

 rays 0.97 (1.0 to 1.2) ; all in length of head (tip of snout to hind margin 

 of opercidar membrane). Depth of caudal peduncle in its length 0.85 

 (0.8 to 0.9); angle of snout profile with lengthwise axis of body 47 

 (45 to 49) degrees. 



Teeth of jaws biserial, those of outer row large, cylindrical basally, 

 flattened distally, with rounded tips, those of inner row smaller and 

 more slender, sharply pointed, fitting closely into spaces between teeth 

 of outer row; snout scaled forward to nostrils, which are close to lip, 

 so that only tip of snout is left naked ; preorbital naked, with concave 

 lower edge ; suborbitals scaled ; cheek with 3 rows of scales ; preopercle 

 with posterior margin naked and very finely serrate (some specimens 

 show serrations only near angle and in all the serrations are so small 

 they may be seen only with difficulty, unless magnified) ; opercle with 

 flat, triangular spine (curved downward in type); spines of dorsal 

 increasing in length to 6th or 7th which are longest, then decreasing 

 in length only slightly to last, soft dorsal and anal outhnes rounded, 

 caudal angular, very shallow fork; pelvics pointed; pectorals rounded. 



Color in alcohol. — Head and body dark reddish brown, each scale 

 on head and back with a round blue spot on base, scales of sides with 

 a narrow vertical blue basal bar, sometimes this bar constricted, form- 

 ing 2 oval spots; a squarish intensely black spot about size of eye on 

 basal portion of last 3 dorsal spines and first 2 soft rays and on back 

 above lateral line; anus and genital papilla intensely black; caudal 

 peduncle bright yellow; spiny dorsal membranes dusky brown, with 

 narrow black distal margin; soft dorsal and caudal fin pale or pale 

 yellow; anal fin dusky brown on spines and anterior rays, posterior 

 rays pale, colorless; pelvics brown; pectoral pale, its base not darker 

 than rest of body; no dark axillary spot. 



Remarks. — This species differs from all others of the genus Poma- 

 centrus by its few dorsal rays, the large black spot on last 3 dorsal 

 spines, entu-ely colorless caudal, and lack of black pigment on pectoral 

 base. Named traceyi after Dr. Joshua I. Tracey, of the U. S. Geologica 

 Survey. 



