. Beginners zoology. Zoology. BATRACHIA 131 upper and lower eyelids of the same thickness ? With which Hd does it wink ? Close its eye ? Observe the large oval car drum or tympanum. What is its direction from the eye? (Fig. 251.) The Is there a projecting ear.'' Does the frog hear ' What reason for your answer ? As in the human ear, a tube (the Eustachian tube) leads from the mouth to the inner side of the tympanum. How many nostrils? (Fig. 251.) Are they near to- gether or separated .-' Large or small} A bristle passed into the nostril comes into the mouth not far back in the ro
. Beginners zoology. Zoology. BATRACHIA 131 upper and lower eyelids of the same thickness ? With which Hd does it wink ? Close its eye ? Observe the large oval car drum or tympanum. What is its direction from the eye? (Fig. 251.) The Is there a projecting ear.'' Does the frog hear ' What reason for your answer ? As in the human ear, a tube (the Eustachian tube) leads from the mouth to the inner side of the tympanum. How many nostrils? (Fig. 251.) Are they near to- gether or separated .-' Large or small} A bristle passed into the nostril comes into the mouth not far back in the roof. Why must it differ from a fish in ' How do \\\ and hind legs dM^ox} How many toes on the fore foot or hand .'* On the hind foot} On which foot is one of the toes rudimentary .'' Why is the fore limb of no assistance in propelling the body in jumping .? Do the toes turn in or * (Fig. 250.) How does the frog give direction to the jump } What would be the disadvantage of always jumping straight forward when fleeing.'' Which legs are more useful in alighting.'' Divisions of the Limbs. — Distinguish the upper arm, fore- arm, and hand in the fore limb (Figs. 252 and 253). Compare with skeleton of man (Fig. 399). Do the arms of a man and a frog both have one bone in the tipper arm and two in the forearm ? Both have several closely joined bones in the wrist and. Fig. 252. —Skeleton of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coleman, Walter M. Toronto : Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
