PRINCIPAL FAMILIES OF FISH. 
27 
several genera. Serranus, Genyoroge, Mesoprion, 
etc., and Ambassis, the latter are small fishes, and 
are found in fresh water. 
Pris iipoma tidce. 
These form a large family, mostly found in salt 
water, in the tropical regions. They are large, hand- 
some fishes. Several genera, for instance, Therapon, 
Diagramma, Datnoides, etc., are represented in Indian 
seas. 
Mullidce. 
That delicious fish, the Eed Mullet, belongs to this 
family, it inhabits European seas. 
Squctmipinnes. u Scaly-finned fishes.” 
This family consists mostly of bright-coloured 
fishes, with bodies very deep in comparison to their 
length, and very narrow, with small mouths, inhabit- 
ing tropical seas. The Choetodons, and Holocanthi, 
form good Indian examples. This family is distin- 
guished by the scales extending over a large portion 
of the dorsal and anal fins. 
Trigliclce. Gurnards. 
Are a large family, containing a great variety of 
fishes of extraordinary shapes and coloration, mostly 
marine. The British Gurnards, Bullheads, Miller’s 
thumb, the Indian Dactylopterus, or Flying Gurnard, 
Pterois, Scorpoena, and Platycephalus, are included in 
this group. 
Trachinidce. 
The fishes of this family are generally of a long 
