1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



57 



width of head 2tV in its length; depth of head 1^; mandible U; first 

 dorsal ray about 2; first anal ray about 2i; upper caudal lobe 1|; 

 pectoral If; ventral 1|; snout 3f in head, measured from its tip; eye 

 4; maxillary 1^; intcrorbital space 3^; least depth of caudal peduncle 

 4f ; sixth dorsal spine 4. 



Body rather elongate, somewhat oblong-ovate, strongly compressed, 

 and greatest depth about opposite origin of soft dorsal. Profiles nearly 

 straight after origins of soft dorsal and anal. Caudal peduncle slender, 

 compressed, and its least depth about half of its length. 



Head rather small, compressed, upper profile but little inclined, and 

 nearly straight till a little before spinous dorsal. Lower profile rather 

 convex from tip of mandible. Snout rather short, a trifle longer than 

 eye, rather narrow, convex, and tip of upper jaw rather pointed. 



Fig. 1. — Scomberoides moluccensis (Gray). 



Eye circular, lower rim well below in greatest depth, and posterior 

 rim a little posterior in length of head. Mouth large, gape reaching 

 about opposite front rim of pupil, and tip of mandible produced a 

 little in front beyond tip of upper jaw. Preorbital narrow\ Maxillary 

 long, narrow, its distal expanded extremity equal to about f of pupil, 

 and reaching about opposite first f of orbit. Mandible curved up a 

 little in front. Teeth small, strong, and a single series of rather en- 

 larged ones in upper jaw, especially in front. Front of upper jaw with 

 patch of fine teeth inside and along edges, but narrowing posteriorly. 

 Teeth biserial in mandible, those of outer series very small, close to- 

 gether, and directed outwards. Teeth of outer series of upper jaw 

 fitting in between the two mandibular series when mouth is closed. 

 Four slightly enlarged canine-like teeth in front of lower jaw in inner 

 series. Patches of small teeth on vomer, palatines and pterygoids. 



