146 CALIFORNIA ACADEMY OF SCIENCES 



dark brown spot at base, those so marked forming rather definite large groups, which correspond on 

 the two sides of the fish. A series of four such groups, separated by narrow interspaces, lie along the 

 lower half of the sides. Behind the eye, are three or four narrow wavy dark lines, the lower two 

 joined more or less by irregular cross-branches. A faint dusky streak runs forward from eye to snout, 

 a faint spot below the eye, and a well marked horizontal dusky streak on lower part of cheeks, turning 

 downward and backward across preopercle. A narrow brown streak runs downward and backward 

 across prepectoral area, but fails to reach the median ventral line. 



Spinous dorsal dusky, a small blackish blotch at tip of membrane between first two spines. A 

 very conspicuous elliptical jet-black spot on basal portion of first four rays of the soft dorsal; the spot is 

 faintly ocellated with whitish, above this a faint curved dusky streak, then the translucent margin of 

 the fin. Behind the spot, the dorsal is marked with oblique cross-bands of dusky and whitish. The 

 caudal appears uniformly dusky. The anal is dusky, with a narrow translucent margin. The spine 

 and outer ventral ray are dusky, the rest of the fin whitish. The pectorals are uniformly translucent. 



Named in honor of Richard C. McGregor, a member of the expedition to 

 Panama, to the success of which he materially contributed. 



271. Halichaeres dispilus {Gilnther). 



The types came from Panama, where the species was also secured by the 

 Albatross (Jordan & BoUman, 1889, p. 182). It has been reported also from Aca- 

 pulco and Mazatlan. 



272. Pseudojulis notospilus Gilnther. 



The dark bands across the back are in the number of 8, the first being on the 

 nape, the eighth on the caudal peduncle. Those in front of the soft dorsal become 

 progressively fainter, the anterior three, and the one on caudal peduncle, commonly 

 disappearing in adults. 



The species is very abundant in all rock-pools about Panama. 



273. Thalassoma lucasanum (Gill). 



This species has been recorded from Panama by Gilnther (1864 6, p. 26) 

 without comment. It has not been obtained there by other investigators. 



Family SCARID^. 

 274. Pseudoscarus perrico {Jordan <& Gilbert). 



Occasionally taken about the rocky islands in Panama Bay. Five specimens 

 were secured, ranging in length from 23 to 38 cm. The adipose hump on top of 

 head is variable in its development among individuals of the same size. Our speci- 

 mens are eviscerated, so we are unable to determine whether the development of the 

 hump is dependent on sex. 



The following color-notes were taken from a fresh specimen 263 mm. long: 

 Scales on body with the central portion blue, surrounded by brown. Under parts 

 whitish. A wedge-shaped blue spot immediately behind the eye; 4 narrow blue 



