536 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



bod}" 9 times, and origin of dorsal to center of caudal a little less than 

 one-fifth of length. Origin of anal to center of caudal 7 times and to 

 origin of vontrals 'di in total length. Lower lobe of caudal Oi times in 

 same distance; upper lol^e one-third shorter and much narrower. Eye 

 2i in depth. Head and beak strong and stout. Body of equal height 

 as far as ventrals. Pectorals pointed and equal to height of body in 

 length. Ventrals with emarginate border, first and last ray of equal 

 length. Dorsal with first ray nearly as long as height of body, with 

 emarginate l)order, and last rays quite short. Anal beginning under 

 middle of dorsal, and resembling it in foi'm, ])ut smaller. Caudal 

 so deepl}^ forked that it appears separated into two distinct lobes. 

 Lower lobe longest and broadest, both pointed. Scales large, appear- 

 ing to resem))l(^ those of Ilyporliainplim coitunersonii. 



Color bluish, darkest on back, lighter below. A tinge of green on 

 sides and upper lobe of caudal. A narrow strip of green on middle 

 of sides reaching from pectoral to caudal, with a ])roader stripe of 

 pale silver}' blue, tinged with greenish, bordering it on each side. 

 Lower jaw dark indigo blue toward the tips, lighter toward the head. 

 Fins all pale bluish, caudal dark dusky blue. Scales on back appear 

 to have darker on their margins. (Bjrevoort.) 



This species has not been seen since the drawing was made from 

 which Brevoort compiled his description. Jlis type was from Nafa, in 

 the Kiukiu Islands (Okinawa). The species is very doubtful and may 

 not difi'er from //. sajori. 



Family IIL SCOMBRESOCID^E. 



Body elongate, compressed, covered with small, thin, deciduous 

 scales, the general aspect being that of a mackerel. Both jaws in the 

 adult more or less prolonged, forming a slender beak, the upper jaw 

 always the longer; teeth very feeble, pointed; maxillaries joined fast 

 to premaxillaries, pectoral and ventrals small; dorsal and anal low, 

 similar to each other, each with 4 to (\ detached finlets, as in the Scom- 

 hridse; gill rakers numerous, long and slender. Pharyngeal bones 

 essentially as in Exocmhis- fourth upper pharyngeal on each side 

 wanting or fused with the third; third pharyngeal greatly enlarged, 

 separate from its fellow, covered with tricuspid teeth; second with 

 simple teeth; first toothless; lower pharyngeals united, forming a 

 triangular Ijone with concave surface, covered with tricuspid teeth; 

 into the hollow of this bone the upper pharyngeals fit. Species few; 

 pelagic tishes, swimming close to the surface in large schools in tem- 

 perate regions. They bear strong analogical rescnnblances to the 

 mackerels in form, color, and habits, as well as in the dorsal and 

 anal finlets. The significance of this resemblance is unknown. 

 a. Jaws produced in a short beak, about half-length of rest of head Cololabis, 3. 



