442 Annals of the Carnegie Museum. 



of the symphysis. The inner row is composed of larger, sharp teeth, 

 rather more regularly and more widely spaced and having a slenderer 

 canine just back of the anterior ones near the symphysis, which is 

 directed slightly backwards. 



In the upper jaw is a very irregular outer row of enlarged teeth, 

 consisting of some thick conical teeth inclined outwards, and slenderer 

 ones inclined downward. At the front of the jaw are a couple of larger 

 conical teeth. The vomer and palatines bear villiform teeth; those 

 on the vomer in a semi-round patch and those on the palatines in an 

 elongate patch, wide and round in front and tapering to a thin point 

 behind. 



Genus Tricropterus Rafinesque. 



49. Tricropterus forsteri (Cuvier & Valenciennes). 



No. 8062c, C. M. One large specimen. 



The specimen compares very well with specimens from Japan and 

 with Day's description of the species wrongly called Caranx hippos. 

 The breast is covered with scales, while in the true Scomber hippos 

 Linnaeus and its Asiatic analog. Scomber ignobilis Forskal, there is a 

 patch of scales in the center of the breast surrounded by a naked area. 



We adopt the specific name forsteri for this wide-spread species, the 

 analog of latus of the Atlantic (fallax Cuvier & Valenciennes) although 

 much of the synonymy is doubtful. 



Under the current rules of nomenclature we find ourselves obliged 

 •to regard Scomber speciosus Linnseus as the type of the genus Caranx 

 (Commerson) Lacepede, and as equivalent therefore to Gnathanodon 

 Bleeker, as Gill has already shown. This leaves the name Tricrop- 

 terus Rafinesque {Caratteri, 18 10) as the oldest available for the type 

 of Caranx carangus Lacepede, the genus Carangus of Girard. Both 

 Tricropterus and Carangus are based on Caranx carangus. The name 

 Tricropterus, shortened from Triacropterus, refers to the three free 

 spines supposed to intervene between the dorsal fins, a non-existent 

 character. 



50. Tricropterus jarra (Cuvier & Valenciennes). 

 No. 8069c, C. M. One specimen. 



The example agrees very well with Day's description. The breast 

 in front of the ventral fins is naked; the outer row of maxillary teeth, 

 as well as the small canines in front of the mandible, are similar to 

 those of Tricropterus forsteri. 



