FAMILY LABRIDAE — SCHULTZ 171 



Rendahl (Natural History of Juan Fernandez and Easter Island, 

 vol. 3, Zool., pt. 1, art. 10, p. 65, 1921) described L. semifasciatus from 

 Easter Island, but with XI dorsal spines and 4 canine teeth in the 

 lower jaw, it could not belong to labrichthyiform fishes. 



LABRICHTHYS CYANOTAENIA Bleeker 



Plate 97,F 



LahricUhys cyanotaenia Bleeker, Nat. Tijdschr. Nederl.-Indie, vol. 6, p. 331, 1854 

 (type locality, Larantuka, Flores); Atlas ichthyologique, vol. 1, p. 154, pi. 

 22, fig. 1, 1862 (Flores). 



Cossyphus unilinealus Guichenot, Rev. Zool. Guerin, p. 284, 1847 (type locality, 



Guam). 



SPECIMENS STUDIED 



Rongelap Atoll: Lomuilal Island, August 1, 1946, S-46-306, 1 specimen, 67 mm. 

 Eniwetok Atoll: July 1946, Univ. Washington, 3 specimens, 97 to 121 mm. 

 Guam: Tumon Bay, January 8, 1946, Gressitt and Ingram, 1 specimen 35 mm. 



Description. — Counts are recorded in table 99. Head 2.4 to 2.9; 

 greatest depth 2.6 to 2.9; longest pectoral ray 5.0 to 5.5; snout tip to 

 anus 1.6; snout to dorsal origin 2.7 to 3.0; all in the standard length. 

 Snout 2.7 to 3.0; eye 4.5 to 6.5; postorbital length of head 1.9 to 2.0; 

 interorbital space 3.4 to 3.5; longest pectoral ray, 2.0 to 2.1; least 

 depth of body 1.8 to 2.1 ; all in length of head. Eye in fleshy inter- 

 orbital space 1.1 to 3.5. Dorsal profile of head forming an angle 45 

 to 75 degrees with ventral contour of head, the profile becoming more 

 steep in the large specimens; pectoral fin reaches to opposite the 

 seventh or eighth lateral fine pores; outer soft rays of pelvic fins 

 greatly elongate, reaching to anal origin on small specimens and 

 rear of base of anal fin on the largest ones. 



Color in alcohol. — Background coloration blackish or dark brown, 

 sometimes with a broad paler bar just behind head; median fins and 

 pelvics blackish edged with white; pectoral fin translucent, each ray 

 edged with a blackish or dark brown line; scales on sides sometimes 

 with light centers. 



Genus LABROIDES Bleeker 



Labroides Bleeker, Nat. Tijdschr. Nederl.-Indie, vol. 2, p. 249, 1851 (type spe- 

 cies, Labroides paradiseus Bleeker). 



This genus may be recognized by the following characters: Branched 

 caudal fin rays 6+6; giU rakers very small, about 10 to 12 on first 

 arch; pores in lateral fine 25 to 54, v/ith 3 to 5 scales above lateral 

 line and 10 to 18 below it; dorsal rays normally IX,10 or 11; anal 

 111,10 or 11 ; pectoral ii,ll. Body only a little compressed; upper lip 

 incised at tip; lower lip with forward projecting lobe at front of each 

 side, the area between broadly U-shaped; head moderately pointed, 

 dorsal profile a Httle convex; interorbital space convex; nostrils minute, 



