FAMILY SCOMBRIDAE — SCHULTZ 411 



16, A single lateral line more or less running a dorsal course. 



2a. Body greatly elongate, greatest depth about 6 to 7 and head 4 to 5 in 

 length to fork of tail; dorsal rays about XXIV, III, 8-9; anal about 

 111,8-9; pectoral about ii,20; gill rakers represented by rough places 

 on gill arch, none elongate; sides of body with numerous narrow pale 

 or whiteish bars indistinct dorsally; skin very finely scaled; vomer 

 and palatines with villiform patches of teeth, none on tongue; teeth 

 in jaws, triangular, very close-set. 



Acanthocybium solandri (Cuvier and Valenciennes) 

 26, Greatest depth of body fewer than 6 and head fewer than 4.5 in length 

 to fork of tail; dorsal spines about XII to XV. 

 3a, Tongue toothless, each side with a low but distinct cutaneous fold, 

 with space between concave; soft dorsal and anal fins not white 

 tipped. 

 4a, Lower sides silvery with 4 or more dark streaks, or bands; back 

 usually with some short vertical pale bars; vomer toothless, 

 palatines with a row of fine teeth; gill rakers on first gill arch 

 about 18 + 1 + 37; pectoral rays about ii,26, 



Katsuwonus pelamis (Linnaeus) 



46, Lower sides without dark lengthwise streaks, or bands; gill rakers 



on first gill arch 7 or 8 + 1 + 20 to 25. 



5a. Usually numerous pale or whitish narrow vertical lines or bars, 



or a series of white dots on sides; fins bright yellow; gill rakers 



usually 8+1 + 20 to 22; dorsal rays XIII-111,11 or 12-9; anal 



111,10-8; pectoral rays ii,33 to 35; vomer with a patch of 



villiform teeth, those of palatines in a single or very narrow row; 



pectoral fin length 3 to 3}^ in standard length. 



Neothtuinus albacora macropterus (Temminck and Schlegel) 



66. No vertical pale lines or bars; obliquely ascending dark bands 



above lateral line; area between pectoral and pelvic fins 



usually with 1 to 5 black spots; a black blotch below border 



of eye; giJl rakers 7 or 8+1 + 24 or 25; dorsal rays XV-III,8 



or 9-8; anal 111,10-7; vomer and palatines with a few tiny 



teeth in a single or very narrow row; pectoral fin length 6 to 6}^ 



in standard length. 



Euthynnus aflanis yaito Kishinouye 

 36. Tongue with a villiform patch of teeth on each side of a naked midline; 

 no cutaneous fold on tongue; fins generally blackish with a white 

 tip on soft dorsal and anal fin; no pale or dark streaks on body; 

 gill rakers about 1 + 1 + 11; dorsal rays XV,III,10-7; anal 111,10-6; 

 pectoral rays about ii,25; vomer toothless; palatines with villiform 

 teeth Gymnosarda nuda Giinther 



Genus GRAMMATORCYNUS Gill 



Grammatorcynus Gill, Proc. Acad. Nat. Sci. Philadelphia, p. 125, 1862 (type 

 species, Thynnus bilineatus Riippell). 



GRAMMATORCYNUS BIUNEATUS (Rttppell) 



Plate 123,A 



Thynnus bilinealus RtJppELL, Neue Wirbelthiere zu der Fauna von Abysinnien 

 gehorig, Fische, p. 39, pi. 12, fig. 2, 1835 (type locality, Red Sea). 



