FAMILY LAB RID AE — SCHULTZ 169 



392 and 435. Longest fin ray of pectoral 176 and 204, of pelvic 171 

 and — ; longest dorsal spine (first) including filament 225 and 122; 

 bony part of anal spine 118 and 129; longest ray of caudal 241 and 

 243; soft dorsal 151 and 153, soft anal 143 and 137. 



Head 2.7 to 2.9; greatest depth 2.5 to 3.0; longest pectoral ray 

 5.0 to 5.3; snout tip to anus 1.7; snout tip to dorsal origin 2.3 to 

 2.6; all in standard length. Snout 2.9 to 3.0; eye 3.8 to 4.4; post- 

 orbital length of head 2.1 to 2.2; fleshy interorbital space 4.0 to 5.0; 

 longest pectoral ray 1.9 to 2.0; least depth of caudal peduncle 1.8 

 to 2.3; all in length of head. Eye in fleshy interorbital space 0.6 to 

 1.0. 



Dorsal profile of snout forming an angle of 60 to 67 degrees with 

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

 pore 8; first soft ray of pelvic longest; distal margin of caudal fin 

 rounded ; all spiny dorsal rays pungent, the first two with long fleshy 

 filaments on adult males, whereas those on adult females are shorter; 

 on adult mature males shorter filaments may occur on the third and 

 fourth dorsal spines; anal spines without or with a very short filament 

 on second spine; second anal spine stronger and a little longer than 

 second. 



Color in alcohol. — Background greenish; a median dorsal brown 

 streak in front of dorsal fin, then a short one each side from above eye 

 to opposite dorsal origin, then 3 brown streaks on upper side of body, 

 the ventral most extending from eye tlu"0ugh upper edge of gill opening 

 to caudal fin base along scale row above peduncular lateral line; 

 all brown streaks have pale centers; dorsal surface of head with 3 

 short brownish streaks; under side of head pale; basal part of ah fins 

 blue-green; belly brownish, with a greenish band extending from base 

 of pectoral posteroventrally to region of anus. 



Ecology. — This new species occurred abundantly in the intertidal 

 zone of the reefs among coral heads and algal growths, and at depths 

 down to at least 40 feet. 



Remarks. — The specimen from Hawaii indicates a wide range in 

 the Indo-Pacific for this new species. It may be distinguished from 

 its closest relative, P. hexataenia by the occurrence of only 3 brown 

 streaks on the upper side and no dark spot at base of caudal fin, 

 whereas in hexataenia there are 6 dark streaks on the sides and a 

 black caudal spot. In addition tetrataenia normally has ii,14 pectoral 

 rays, whereas in hexataenia ii,13 and ii,14 pectoral rays occur in almost 

 equal numbers (see table 92) . P. tetrataenia may be distinguished from 

 the other species in the genus by the key (p. 164). 



Named tetrataenia in reference to the 4 dark streaks. 



