408 SNODGRASS AND HELLER 



series from first dorsal spine to anal 32. Dorsal and ventral outlines 

 symmetrical, body elongate, ovate ; teeth strong, flat, obliquely inclined 

 forward, notched outer angle most prominent, lower median teeth 

 largest ; teeth white and pale green ; eye oval, longitudinal diameter the 

 longer, 2 in interorbital space ; first dorsal spine strong, tuberculate on 

 outer surface ; second short, i of first ; third about ^ of second ; soft dor- 

 sal and anal similar to each other, each high, no rays projecting beyond 

 membranes, posterior borders concave ; caudal angles produced, me- 

 dian rays f of lower lobe, which is a little the longer; scales rough- 

 ened each by a central group of tubercles, each of the posterior ones 

 with a median carina forming about 9 longitudinal rows on caudal 

 peduncle, some of which continue forward on body extending faintly 

 even past the middle of the body; pectoral small, upper rays longest; 

 front of anal beneath front of posterior two-thirds of dorsal ; first dor- 

 sal spine a little back of base of pectoral; ventral spine short and 

 blunt, midway between front of anal and vertical from base of pectoral ; 

 entire body scaled, except preorbital groove, space about nostrils, lips, 

 and dorsal ridge bearing rays of dorsal fin. 



Color in life. Above light purplish-brown, whitish on belly, dark- 

 est on snout ; iris olive ; fins all dusky. 



140. XANTHICHTHYS MENTO ( Jordan & Gilbert). 



Balistes mento JORDAN & GILBERT, Proc. U. S. Nat. Mus. 1881, 228, Clarion 



Island. 

 Xanthichthys mento, JORDAN & EVERMANN, Fishes North and Mid. Amer., 



ii, 1710, 1898. JORDAN & MCGREGOR, Rep. U. S. Fish Comm. for 



1898 (1899), 280, (Clarion and Socorro islands). 



Range. Revillagigedo Archipelago. 



Known only from Clarion and Socorro islands, Revillagigedo 

 Archipelago. 



141. MELICHTHYS BISPINOSUS Gilbert. 



Melichthys bispinosus GILBERT, Proc. U. S. Nat. Mus. 1890, 125, Clarion 

 and Socorro islands. JORDAN & EVERMANN, Fishes North and Mid. 

 Amer., II, 1711, 1898 ; ibid, Check-list, p. 423. 



Range. Revillagigedo Archipelago and Cocos Island. 



We have 6 specimens from Cocos Island. 



Color in life. Sides, back and belly emerald-green, each series of 

 scales with a dark brown band mesially ; a large light bronze cheek 

 patch extending from below eye to mouth ; top of head and snout irreg- 

 ularly banded with dark brown; caudal with fine blue stripes near tip; 

 dorsal and anal like back, with narrow light blue stripe at base;, 

 pectorals like sides; iris black. 



