1 66 GILBERT 



of the bone. Gill-rakers 6 -)- 21, this number including five anterior 

 spinigerous rudiments. The longest gill-raker is contained i|- times 

 in the diameter of the pupil. Eye 2^ in snout, 5 in head. 



The barbels extend to the anterior margin of the first median scale 

 in front of the ventral base, their length 3^^ in length of fish (to base 

 of caudal). Bony interorbital width 2-| in the snout. 



The dorsal spines are slender, rather high, the second and third 

 about equal, half the length of the head. The ventrals reach the vent, 

 and equal the length of the snout and eye. The pectorals are shorter, 

 and equal snout and half eye. 



D. VIII-I, 8; A. 11,6; P. 16; V. 1,5. 32 scales in the course 

 of the lateral line, 2i rows above it, 5^ rows below. The tubes of 

 the lateral line are profusely branched, the branches covering the 

 greater part of each scale, there being as many as 12 branches present 

 along the middle of the course of the lateral line. 



In spirits almost uniform olivaceous, with a remaining trace of red 

 on some of the scales. Two narrow yellow streaks, separated by an 

 interspace slightly less than diameter of pupil, run horizontally from 

 the opercular spine, converging gently backward to meet where they 

 join lateral line on caudal peduncle. 



30. Scomberomorus maculatus (Mitchill). 

 Pernambuco ; Maceio. 



31. Trichiurus lepturus (Linnaeus). 

 Maceio. 



32. Oligoplites saliens (Bloch). 



A single specimen from Maceio, 235 mm. long, is very close to 

 O. saurus^ but differs from all specimens which I have seen of that 

 species in the deeper body, the larger more oblique mouth, the nar- 

 rower maxillary, the relative size and shape of the suborbital bones, 

 and in having four instead of five detached spines in the first dorsal 

 fin. As these are the characters said to distinguish O. saliens^ I place 

 it provisionally in that species. Abundant material will be needed to 

 determine the status of these two forms. 



The maxillary reaches the vertical from the posterior edge of the 

 eye; its length is contained if times in the head. The mouth is con- 

 siderably more oblique than in O. saurus, the maxillary is narrower 

 at the tip, and does not curve downward so perceptibly. The man- 

 dible is also slightly slenderer. The tip of the snout is thus higher, 

 being above the upper edge of the pupil, while in O. saunis it is 

 plainly below the upper edge of the pupil. The snout is shorter than 

 the eye. 



