6$ FISHES OF SINALOA. 44I 



Gray above, with deep green reflections, lower half 

 silvery, with strong golden tinge. Axil jet black, the 

 color covering base of fin and extending behind for a 

 distance nearly equal to eye, so that the fin does not cover 

 it ; upper fins dusky, the caudal edged with paler, anal 

 duskv with golden tinge, ventrals purplish white. Pec 

 torals dusky; maxillary with a black streak. 



99, Seriola mazatlana Steindachner. 



Originallv described from Mazatlan by Steindachner. 

 but not seen by Dr. Gilbert or by us: probably a migra- 

 tory species. 



Family NEMATISTIID^. 



100. Nematistius pectoralis Gill. Papagallo. 



Very common in all the waters about Mazatlan; speci- 

 mens reaching the length of about three or four feet found 

 about the islands of Venados, Isla Blanca and Creston. 



Color silvery, iridescent bluish above, with black bands ; 

 the first across tip of snout ; the second across interorbital, 

 involving the top of membranous eyelid; the third from 

 nape across opercle ; the fourth including the first dorsal 

 spine and running obliquely down on the belly, where it 

 fades out at about the tip of the pectoral fin; the fifth 

 running from middle of first dorsal obliquely to lateral 

 line, then backwards along lateral line to upper lobe of 

 caudal, including the whole upper half of caudal peduncle ; 

 a sixth indistinct band, following the line of the back for 

 a short distance, under the soft dorsal; upper part of 

 maxillary dusky; long spines of dorsal with alternate 

 bands of yellow and black, and much slaty-bluish at base ; 

 soft dorsal and caudal uniform dusky; pectoral with a 

 black spot on lower rays, not involving the axil; ventrals 

 white; anal slightly dusky. 



Described from a specimen sixteen inches long. 



2d Ser., Vol. V. ( 29 ) August 15, 1895. 



