Introduction to the Study of Nature Illustrative of the Attributes of the Almi
Introduction to the Study of Nature Illustrative of the Attributes of the Almi
J Stevenson John Stevenson Bushnan
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The form of the pupil is transversely oval in the pecora and solidungula, and vertically oval in the Ferae ; consistently with what I have already remarked upon this subject. The direction of the eye-balls is in most mammiferous animals outwards ; in the ape however, baboon, monkey, and some few others, it is, as in man, directly forwards : further, in some quadrupeds, as the camel-leo- pard, the eye-ball, though naturally directed out- words, may be turned so far backwards as to enable the ani...mal to see distinctly behind it. Like the nocturnal animals, also, of other tribes, quadrupeds which prowl by night, such as the lion, lynx, cat, bat, &c. , have the struc- ture which I have already more than once de- scribed, as calculated to enable them to dis- tinguish objects in comparative darkness. On the other hand, where the habits of the animal are such as to exclude it altogether from the light, as no structure of the eye could have com- pensated for the want of this essential condition of sight, nature has denied them a visual ap- paratus altogether as in the case of the mole, which has no optic nerve, and an eye so small, that its existence has been doubted.
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