166 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 2 



and orange stripes continued on dorsal, terminal portion somewhat 

 orange; soft fin hyaline. Caudal emerald, small black speck in upper 

 base. Anal with terminal portion of membrane pale reddish and its 

 base blue. Ventrals blue. Pectorals hyaline." 



Ecology. — This small-sized species reaches matm-ity at a length of 

 40 mm. and smaller. It is a common inhabitant of the intertidal 

 zone on the reefs and of depths to at least 40 feet in the lagoon. 



PSEUDOCHEILINUS OCTOTAENIA Jenkins 



Plate 99, C 



Pseudocheilinus odotaenia Jenkins, Bull. U. S. Fish. Comm. vol, 19 (1899), 



p. 64, fig. 22, 1900 (type locality, Hawaiian Islands). 

 Pseudocheilinus margaretae Smith, Ann. Mag. Nat. Hist., ser. 12, vol. 8, p. 928, 



fig. 1, 1955 (type locality, Aldabra, Indian Ocean). 



SPECIMEN STUDIED 



Bikini Atoll, Arji Island, lagoon, depth 20 to 40 feet, August 7, 1946, S-46-308, 

 Herald and Brock, 1 specimeu, 76 mm. 



Description. — Dorsal rays IX,11; anal 111,9; pectoral ii,12-ii,ll; 

 pores in lateral line 17 + 6, with 2 scales above and 7 below to anal 

 origin; gill rakers in two Johnston Island specimens are 4-|-l + 7 or 8. 

 See table 92 (p. 129) for additional counts. 



Head 2.6; greatest depth 3.0; longest pectoral ray 5.2; snout tip 

 to anus 1.7; snout tip to dorsal origin 2.3; aU in standard length. 

 Snout 2.6; eye 4.6; postorbital length of head 2.1; Heshy interorbital 

 space 5.7; longest pectoral ray 2.0; least depth of caudal peduncle 

 2.2; all in length of head. Eye in fleshy interorbital space 0.8. 



Dorsal profile of snout forming an angle of about 55 degrees with 

 ventral contour of head; pectoral fin reaches to opposite lateral line 

 pores 8 or 9; first soft ray of pel vies longest; distal margin of caudal 

 fin rounded; all spiny dorsal rays pungent, without elongate filaments; 

 second and third anal spines strong and heavy, of about same length. 



Color in alcohol. — Background light tan or light brownish; a median 

 dark streak in front of dorsal fin and 7 brown lines or streaks on side 

 of Bikini Atoll specimen, and 8 or 9 dark streaks in Johnston Island 

 and Hawaiian Islands specimens; ventralmost of these streaks on 

 the Bikini specimens begins in axil of pectoral, whereas in Johnston 

 Island and Hawaiian material it begins on the second scale row below 

 pectoral fin base; anterior edge of fleshy orbit black lined; dorsal 

 surface of head with about 5 dark lines. 



Ecology. — This species appears to be uncommon and was never seen 

 by us in the intertidal zone in the northern Marshall Islands, but at 

 Johnston Island it occurred in pools among luxuriant growths of corals 

 and algae at a depth of 5 to 10 feet. 



