. Beginners' Zoology . he direc-tions and questions may be used with any bird at hand. Whenstudying feathers, one or more should be provided for each pupilin the class. The feet and the bills of birds should be kept forstudy. Does the body of the bird like the toad and the turtle,have a head, a trunk, a tail, and tiA^opairs of limbs? Do the fore andhind limbs differ from each other more orless than the limbs of other backbonedanimals? Does any other vertebrate usethem for^^ purposes as widely different? Eye.— yk Does the eyeball have parts correspondingto the eyeball of a fish or a frog; viz.,
. Beginners' Zoology . he direc-tions and questions may be used with any bird at hand. Whenstudying feathers, one or more should be provided for each pupilin the class. The feet and the bills of birds should be kept forstudy. Does the body of the bird like the toad and the turtle,have a head, a trunk, a tail, and tiA^opairs of limbs? Do the fore andhind limbs differ from each other more orless than the limbs of other backbonedanimals? Does any other vertebrate usethem for^^ purposes as widely different? Eye.— yk Does the eyeball have parts correspondingto the eyeball of a fish or a frog; viz., cornea, iris, pupil?Which is more movable, the upper or the lower eyelid?Arethere any lashes? The bird (like what other ) hasa third eyelid, or nictitating membrane. Compare itsthickness with that of the other lids. Is it drawn overthe eyeball from the inner or the outer corner of the eye?Can you see in the human eye any wrinkle or growthwhich might be regarded as remains, or vestige, of such amembrane ? ICO.
Size: 1888px × 1324px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidbeginnerszoo, bookyear1922
