Cassells Natural History
Cassells Natural History
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In our eReader you can find the full English version of the book. Read Cassells Natural History Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Cassells Natural History
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The carapace is a modification of the bones of the vertebral column and ribs, and also consists of bony plates which, growing in the skin, unite all together. The under part of the buckler, the plastron, is formed exclusively of skin or dermal bones, and usually consists of nine pieces or plates, more or less 248 THE REPTILES 249 developed. The " tortoiseshell, " which is the ornamental horny covering of the carapace and plastron, and out of which hair- combs and other articles are manufactured..., is to all intents and purposes an outside or " scarf-skin " structure belonging to the epidermis. It is in the form of thin plates, which are united together at their edges, and which correspond to a certain extent only with the underlying bones of the buckler.
The eggs of the Land and Fresh-water Tortoises are of a cal- careous nature outside, but those of the Turtle are leathery or parchment-like to the touch. The egg-producing organ is very similar to that of birds, and the internal structure of the egg and the development of the young in its early stage differ in no very essential circumstances from those of the bird.
What to read after Cassells Natural History?
You can find similar books in the "Read Also" column, or choose other free books by F Martin Francis Martin Duncan to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The carapace is a modification of the bones of the vertebral column and ribs, and also consists of bony plates which, growing in the skin, unite all together. The under part of the buckler, the plastron, is formed exclusively of skin or dermal bones, and usually consists of nine pieces or plates, more or less 248 THE REPTILES 249 developed. The " tortoiseshell, " which is the ornamental horny covering of the carapace and plastron, and out of which hair- combs and other articles are manufactured..., is to all intents and purposes an outside or " scarf-skin " structure belonging to the epidermis. It is in the form of thin plates, which are united together at their edges, and which correspond to a certain extent only with the underlying bones of the buckler.
The eggs of the Land and Fresh-water Tortoises are of a cal- careous nature outside, but those of the Turtle are leathery or parchment-like to the touch. The egg-producing organ is very similar to that of birds, and the internal structure of the egg and the development of the young in its early stage differ in no very essential circumstances from those of the bird.
What to read after Cassells Natural History?
You can find similar books in the "Read Also" column, or choose other free books by F Martin Francis Martin Duncan to read onlineMoreLess
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