162 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



opening. Lateral line complete, arched anteriorly for about 19 scales, 

 thence descending abruptly to mid-line of sides and continuing to caudal 

 base. Two scale rows between anterior end of lateral line arch and 

 dorsal base and one row posteriorly. Four scale rows above and below 

 the straight portion of the lateral line at the beginning of the soft dorsal. 



Head bluntly conical, 3.62 to 4.5 in standard length. Greatest width 

 of head (behind eyes) 1.3 to 1.5 in its length. Dorsal outline of head 

 descending gradually from nape to tip of snout in a long, flattened cui-ve. 

 Ventral outline of head curving steeply upward from ventral insertion to 

 symphysis of lower jaw. Eyes moderate, superior, closely approximated, 

 5 to 6.1 in head; extending slightly beyond dorsal outline of head but not 

 placed on the end of stalks. Interorbital reduced to a septum between 

 the eyes, 2.3 to 3.5 in eye, 17.6 to 20 in head. Snout moderately pointed, 

 not abruptly cut off or truncated anteriorly. Mouth oblique (20° to 30° 

 from horizontal). Maxillary reaching to, or slightly past, posterior 

 edge of eye, its length 2.5 to 2.75 in head. Premaxillaries slightly pro- 

 tractile. Lower jaw projecting, no papilla or flap of skin at symphysis of 

 lower jaw. Fringe of upper lip developed anteriorly only, fringe of 

 lower extending laterally to rictus. Branchiostegal rays 6. Gill-rakers 

 absent. 



Body color in alcohol a light yellowish buff with five irregular, darker 

 transverse bars crossing the body. The first bar is immediately behind the 

 base of the pectoral fin, the second under the thirteenth and fourteenth 

 dorsal spines, the third at the mid-point of the body length, the fourth at 

 the beginning of the posterior third of the body length, and the fifth under 

 the posterior dorsal rays. A few, irregular, dark spots and blotches on the 

 body between the crossbars. An elongate dark blotch at the base of the 

 caudal fin. Head dorsally and laterally to below eye with irregular 

 darker markings, becoming lighter ventrally. Fins and labial fringes 

 pale. 



Cokeridia lactea, new species 

 Plate 21, fig. 3 



Holotype.—AHY no. 909. 



Type locality. — Station 789-38, South Seymour Island, Galapagos, 

 poisoned with derris root in tide pool, January 19, 1938, by G. S. Myers. 



Paratypes. — AHF no. 910. Station 782-38, 1 specimen, 34.5 mm, 

 Darwin Bay, Tower Island, Galapagos, poisoned with derris root in tide 

 pool, January 16, 1938. — AHF no. 911. Station 784-38, 2 specimens, 22 

 and 31 mm, Darwin Bay, Tower Island, Galapagos, poisoned with 



