178 Annals of the Carnegie Museum. 



Colypes. — Four specimens, 61 to 75 mm. C. M. No. 3372. Xiririca, Dec. 8, 

 igoS. 



Colypes. — Eleven specimens, largest 40 mm. C. M. No. 3373. Iguape, Dec. 15. 

 1908. 



Head 4.25-4.2; depth 2.5-3; D. 10-11; A. 23-27 ; 8 scales 6 or, 7-34 

 to 38 9 -5 or 6; eye 2.75-3 in the head, a little less than, or equal to, 

 the interorbital. Compressed, dorsal and ventral profiles equally 

 arched; snout blunt, profile slightly depressed over the eye; preventral 

 area rounded, without a regular median series of scales; post-ventral 

 area narrowly rounded; predorsa larea inconspicuously keeled, with a 

 median series of about ten scales. Occipital process bordered with 

 three scales on each side, its length one-sixth of the distance from its 

 base to the dorsal; interorbital convex, frontal fontanel much shorter 

 than the posterior without the groove; second suborbital leaving a 

 naked area about one-third as wide as the bone; maxillary equal to 

 the snout in length, its margin very convex; premaxillary with three 

 teeth in the front series, five five-pointed teeth in the second; maxillary 

 with two teeth; dentary with seven or eight graduated teeth. Gill- 

 rakers 8 + 14. Scales regularly imbricate, no interpolated rows; anal 

 sheath of a few scales along the base of the anterior rays; lateral line 

 complete; each scale with several radial striae. Origin of dorsal mid- 

 way between tip of snout and base of upper caudal rays; origin of 

 anal below, or behind, the base of the last dorsal ray. Dorsal pointed, 

 the highest ray 3.5-4 in the length. Anal emarginate; caudal about 

 3.5 in the length; origin of ventrals in front of the vertical from the 

 origin of the dorsal; ventrals not reaching anal, pectorals not to ven- 

 trals. Humeral spot large, on about six scales above the third to fifth 

 scales of the lateral line, and with an extension toward the scapular 

 process; caudal spot large and well defined, covering the entire width 

 of the caudal peduncle; bases of middle caudal rays included in the 

 spot, which does not extend to the ends of these rays. The specimens 

 collected December 8, at Xiririca, are much lighter, the markings less 

 well defined. 



This species is closely allied to mutator and intermedins. 



8 One with 23, two with 24, nine with 25, seven with 26, two with 37. 



9 Three with 34, five with 35, three with 36, two with 38. 



