NO. 6 MYERS AND WADE: NEW WEST COAST FISHES 163 



derris root in tide pool, January 17, 1938. — AHF no. 912. Station 

 789-38, 2 specimens, 38 and 38.2 mm, same data as holotype. — AHF 

 no. 913. Station 800-38, 4 specimens, 34 to 38 mm, Cartago Bay, Albe- 

 marle Island, Galapagos, poisoned with derris root in tide pool, January 

 22, 1938. 



Measurements of holotype in mm. — Standard length (to tip of upper 

 jaw) 45.5, depth 9, head 12, tyt 1.4, maxillary 5, snout 2, interorbital 1, 

 predorsal length 9, preanal length 16. 



Description. — Body elongate, rounded anteriorly, becoming com- 

 pressed posteriorly and tapering gradually to caudal base. Greatest depth 

 (behind pectoral base) 4.4 to 5.05 standard length. 



Dorsal IV-VIII, 25 or 26, origin on nape over preopercular margin. 

 Continuous dorsal preceded by four short, blunt, well-separated spines. 

 Continuous dorsal of eight united spines and 25 or 26 articulated rays. 

 Membranes of continuous dorsal spines incised, membrane of dorsal rays 

 entire. Four anterior dorsal spines about one-half the height of united 

 spines, which are less developed than dorsal rays. Posterior dorsal ray 

 not joined by membrane to caudal base. Predorsal length 4.72 to 5 in 

 standard length. Anal fin II, 27 or 28, similar to soft dorsal, origin under 

 about fourth spine of continuous dorsal. Preanal length 2.83 to 2.84 in 

 standard length. Caudal fin with 13 articulated rays, distal edge of fin 

 rounded. Pectoral fin 13, fin broad and short, equal to head in length. 

 Ventrals I, 3, inserted before pectoral base. 



Scales cycloid, 42 or 43 in a lateral series. Scales absent on head, fins, 

 abdomen, and sides of body immediately behind pectoral base. Scales 

 absent between arched portion of lateral line and dorsal base. Three 

 scale rows between dorsal (as well as anal) bases and the median portion 

 of the lateral line at center of body length. Lateral line present, complete ; 

 origin at upper end of gill-opening, arched anteriorly for 12 or 13 scales, 

 descending abruptly to mid-line of sides and continuing to caudal base. 



Head moderate, slightly longer than deep, 3.63 to 3.79 in standard 

 length. Dorsal outline of head almost horizontal. Ventral outline 

 curved steeply upward from anterior edge of ventral base to tip of snout. 

 Eyes small, superior, 8.5 to 9.3 in head; placed on the ends of short, 

 retractile stalks. Interorbital narrow and concave, 12 to 13 in head. 

 Dorsal aspect of head broad and flat, slightly convex posterior to eyes. 

 Mouth almost vertical, lower jaw projecting beyond tip of snout. Lips 

 fringed anteriorly, but not laterally. Maxillary reaching a vertical from 

 posterior margin of eye (when retracted into head), 2.4 to 2.6 in head. 

 Nostrils paired, anterior nostrils tubular. Snout short, 6 to 7.2 in head. 



