bertcim;. 
385 
articulated rays ; dorsal and anal fins with anterior spines, which 
are usually not so numerous as the articulated rays. Squamation 
more or less regular and continuous, sometimes with a few enlarged 
acutes ; lateral line conspicuous. 
All the known Berycidae are marine, and most of the existing 
genera live at considerable depths, while many are typical members 
the deep-sea fauna. 
Synopsis of Extinct Genera and Genera represented by Extinct 
f' Dorsal fin undivided. 
A- With few crowded spines in front.. 
Vertebrae 10+14; anal fin much ex- 
tended ; scales ctenoid, none enlarged . 
Vertebral 12+16 or 18; anal fin short- 
based ; scales ctenoid, enlarged along 
lateral line 
Vertebrae 12+14; anal fin moderately 
extended ; scales thin and cycloid, none 
enlarged 
Vertebr® 12+16 or 18; anal fin ex- 
tended ; scales small, thick, and 
ctenoid, none enlarged. ............. 
D- With anterior spines more or less spaced. 
Dorsal fin-spines 5 to 9, anal 3 to 5 ; 
scales large and ctenoid 
Dorsal fin-spines 14, anal 7 ; scales small 
and cycloid 
Dorsal fin-spines about 12, anal 4 ; scales 
thin and ctenoid 
D Spinous portion of dorsal fin separated from 
articulated portion. 
Preoperculum merely serrated, without 
spine 
Preoperculum with large spine at angle . 
Beryx (p. 385). 
Sphenocephalus (p. 387). 
Acroyaster (p. 388). 
Pycnoeterinx (p. 391). 
Iloplopteryx (p. 396). 
Dinopteryx (p. 406). 
Homonotus (p. 407). 
Myripristis (p. 410). 
Holocentrum (p. 412). 
Genus BERYX (Artedi), Cuvier. 
[ltcgne Animal, ed. 2, vol. if. 1829, p. 151.] 
1 runk laterally compressed, but not much deepened ; abdomen 
flattened, not carinated. Frontal region of skull deeply ridged for 
mucus-cavities ; cleft of mouth oblique, and jaws with very minute 
teeth ; orbit much enlarged ; preoperculum without spine, only 
finely serrated. Vertebr® about 10 in the abdominal, 14 in the 
caudal region. Pelvic fins with one spine and / or more articulated 
part iv. 2 c 
