First lesson in zoology : adapted for use in schools . e-sided,d;he vertebral column ending 10 i,^ne verteoral coin tlAtcJl^ 146 FIBBT LE880N8 IN ZOOLOaT. in the larger, upper lobe. They also have from five toseven gill-openings or slits, whereas the cod or perch hasbut one. The skin is either smooth, or with minute scales,forming shagreen. Both jaws arearmed with numerous sharp, flat-tened teeth, arranged in rows andpointing backward, enabling themto seize and retain their prey. With the appearance of sharksthe world of life realized a neworder of things. Never before hadanimals lived so well
First lesson in zoology : adapted for use in schools . e-sided,d;he vertebral column ending 10 i,^ne verteoral coin tlAtcJl^ 146 FIBBT LE880N8 IN ZOOLOaT. in the larger, upper lobe. They also have from five toseven gill-openings or slits, whereas the cod or perch hasbut one. The skin is either smooth, or with minute scales,forming shagreen. Both jaws arearmed with numerous sharp, flat-tened teeth, arranged in rows andpointing backward, enabling themto seize and retain their prey. With the appearance of sharksthe world of life realized a neworder of things. Never before hadanimals lived so well adapted forthe destruction of the lower ordersof animals, however well protectedthey were by solid shells and othermeans of protection. Sharks andskates are engines of destruction,being the terror of the seas. Theirentire structure is such as to enable them to seize, crush,tear, swallow, and rapidly digest large fishes, shell-fish, star-fish, sea-urchins, or other marine animals. Moreover theirown forms are gigantic, soft, not protected by scales or. Fig. the Ces-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
