I. Fam. ELOPSIDAE. 
Oblong or elongate, more or less compressed. Scales cy- 
cloid, silvery. Head naked, with an occipital collar of thin, 
large scales. Mouth large, terminal; 
lower jaw prominent. Intermaxillaries 
short, not protractile. Lateral border 
of mouth formed by maxillaries, which 
have two supplemental bones. An 
elongate bony gular plate between 
branches of mandibula (Fig. 1). Villi- 
form teeth on jaws, vomer, palatines, 
pterygoids and tongue. A straight 
lateral line with simple or radiating 
tubes. An axillary scale above pectorals 
and ventrals. Dorsal slightly behind 
en ee oe on origin of ventrals. Pectorals low down, 
nders ah e . . 
ee a Bs folding like ventrals. Anal far behind 
g gular plate. dorsal. Gillrakers 13—30. Gillmem- 
branes separated, free. Branchiostegals numerous. Pseudo- 
branchiae present or absent. 
S10 piss co fet nien yee mem. 
a, Large pseudobranchiae. Dorsal and anal depressible in a 
scaly sheet. Dorsal fin without produced rays, longer 
than: anal. Scales small 0. ca aac) oes eee Re ee ee Elops p. 2. 
6. No pseudobranchiae. Dorsal and anal without a scaly 
sheet. Dorsal fin with last ray produced, shorter than 
analea Scalesmlarcensn. cmercucmeeniee nem itn mim t ten te mere Megalops p. 4. 
I. Elops Linné. 
(LINNE. Syst. nat. ed. XII@, I. 1766, p. 518). 
Elongate. Scales thin, small, forming sheets for the depres- 
sible anal and dorsal; those along the straight lateral line with 
a simple tube; a scaly occipital collar. Pectorals and ventrals 
with an accessory scale. Mouth bordered above by well developed 
intermaxillaries and very long maxillaries, which have two 
supplemental bones. Dorsal slightly behind origin of ventrals, 
none of its rays prolonged, longer than anal. Pectorals and 
ventrals moderate. Fine teeth on jaws, vomer, palatines, pte- 
rygoids and tongue. Pseudobranchiae large. Branchiostegals 
