196 THE INHABITANTS OF THE SEA. 
their pursuit and practise their artful dodges with a munch 
better chance of success. The eyes in fishes are observed to 
occupy very different positions in different species, but their 
situation is always such as best to suit the exigencies of the 
particular fish. Thus in the star-gazer and sea-devil, that 
watch their prey from a muddy concealment, they are very 
appropriately placed at the top of the head, while in the flat- 
fishes, where an eye on the side habitually turned towards the 
ground would have been useless, the distorted head, by placing 
both eyes on the same level, affords them an extensive range of 
view in those various directions in which they may either en- 
deavour to find suitable food or avoid dangerous enemies. That: 
fishes are not deficient in the sense of hearing may be seen 
at once by the annexed illustrations, which show a marked 
Internal Ear of Perch. 
similarity of organisation between the human ear and that of 
the perch. It is well known that they start at the report of a 
Osseous labyrinth of the Human Far. 
a, Oval or vestibular fenestra; b, round or cochlear fenestra; ¢c, external or horizontal semi- 
circular canal; d. superior or anterior vertical semicircular canal ; e, posterior or inferior 
vertical semicircular canal ; f, the turns of cochlea, 
eun, though it is impossible for them to see the flash. Sir 
Joseph Banks used to collect his fishes by sounding a bell, and 
the Chinese call the gold-fish with a whistle to receive their 
