348 
ACTINOFTERYGIT. 
Synopsis of Families. 
T. Pelvic fins without anterior spine. 
Vertebrae numerous (above 40), none 
with transverse processes ; spinous 
portion of dorsal fin imperfectly 
differentiated 
Vertebrae numerous (above 40), none 
with transverse processes ; dorBal 
fin extended, without spinous 
portion 
Vertebras numerous (above 40), the ab- 
dominal centra with transverse 
processes; dorsal fin remote, with- 
out spinous portion 
II. Pelvic fins with anterior spine. 
Vertebrae numerous (above 30) ; denti- 
tion usually feeble ; pelvic fins far 
back 
Vertebras few (about 24) ; dentition 
feeble or absent ; pelvic fin-supports 
in contact with postciavicle 
Vertebrae few (about 24); dentition 
powerful ; pelvic fins far back .... 
CnOSSOGNATHID^E 
[(p. 348) 
AlIMODYTIDiK (p. 3o4). 
Scombresocime 
[(p. 3o<3)- 
Atherinid^: (p. 358). 
MUGILIDiE (p. 363). 
SPHYRiENIDiE (p- 3b5)- 
Family CROSSOGNATHIDiE. 
Trunk more or less elongate and laterally compressed. 
with 
| ^ — 
maxilla excluding maxilla from border of upper jaw ; cleft ot ®° ^ 
small, with feeble dentition ; opercular apparatus complete, ^ 
few branchiostegal rays. Vertebrae numerous, probably be 
40 and 50 in total length. Pelvic fins more or less remote, "’i 
spine, but with only 6 to 8 divided rays ; an extended dorsa 
apparently with anterior spinous portion incompletely 1 ® 
tiated ; anal fin small and remote or absent. Scales in r » 
series ; lateral line distinct. 
An imperfectly known extinct family represented on } ^ 
Grossognathus, Syllcemus, and probably allied genera of the ere a 
period. 
Genus CROSSOGNATHUS, Pictet. 
[Foss. Terrain Neocom. Voirons (Paleont. Suisse), 1S5S, 
pt. iii. p. 27.] 
Head and trunk laterally compressed, and snout acutclj P° ^ 
though not produced. Orbit very largo and sclerotic cal 
