1382 
Order Inloml 
Premaxillaries well developed* excluding maxillaries 
from edge of upper jaw. Opercular appartus sometimes in¬ 
complete. Gill openings wide. Gills 4, slit after fourth. 
Pharyngeal bones unmodified. Air bladder small or absent, 
with duct when present. Ovaries with oviducts. Skeleton 
mostly weakly ossified. Front vertebrae simple, unmodified, 
without auditory ossicles; vertebral centra coossified with 
arches. Mesocoracoid arch usally absent or atrophied. 
Shoulder girdle with posttemporal not normally united with 
skull, though touching same at or near nape. Scales mostly 
cycloid, often absent. Photophores usually present. Dorsal 
and anal fins without true spines. Ventrals, when present, 
abdominal. Adipose fin variously present or absent. 
i 
Marine fishes, mostly bathypelagic. Though allied with 
the herring and salmon like groups they differ in the absence 
of the mesocoracoid bone and the connection of the shoulder 
girdle with the skull imperfect. Following Parr* s contention 
the Cetuncule are here omitted and ranged with the Xenoberyces. 
