64 - 
LECTURE VIIL 
the Pacific Ocean, which is smaller than the others^ 
and has ten bars only across the head; 
Of the whole tribe of Pishes, few are more re- 
markable than the genus PleuronecteSi which con- 
tains the different kinds of Flounders^ Turbots, 
Soles and other Fishes of similar kind. In this 
genus nature exhibits a most extraordinary devia- 
tion from her usual plan in the formation of ani- 
mals : tile two sides in this genus representing an 
upper and under surface, one appearing at first 
view to be the back, and the other the belly of the 
Fish. The eyes are placed on one side only, and 
the animal generally swims, not in the manner of 
other Fishes, but sideways, or with the coloured 
surface upwards and the pale one downwards. In 
order to facilitate the investigation of this numerous 
genus, Linnmus divides them into such as have 
the eyes looking either to the left or the right. 
If a Fish of this nature be laid with its coloured 
side upwards, and its belly towards the observer, 
then if the eyes are on the right hand, it belongs 
to the division OciiUs dextris of Linnasus : if on 
the contrary the eyes are on the left hand, it then 
must be sought for in the left handed division of 
the genus, or among those, in the Linnaean phrase. 
