Lectures On Mollusca Or Shell Fish And Their Allies
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The CaBcids culminate in tropical America, east and west ; and are curiously rare in the Pacific ocean. GM 62 LECTURES ON MOLLUSCA. Family VERMETIDJE. (Worm-Shells. ) On almost all shells and stones that have lain long in the sea are to be found irregularly twisted shells, sometimes assuming a more or less spiral form, sometimes almost straight. A large proportion of these have no connection with shell-fish : being true worms, the sea analogues of the earthy tribes : jointed animals with red bl...ood and symmetrical organs. When taken alive, these are recognized by the beautiful bunch of feelers, bearing an operculurn (sometimes adorned with stag's horn processes, and never spiral) on a fleshy cup in the middle. Some of these, , as the tiny Spirorbis, so prolific on sea weeds, stones, &c. , in the colder seas, have pretty regularly formed spiral shells. But in the tropical and warmer temperate regions, many species are found, the animal of which is not indeed so beauti- ful, but far more highly organized.
What to read after Lectures On Mollusca Or Shell Fish And Their Allies?
You can find similar books in the "Read Also" column, or choose other free books by Philip P Philip Pearsall Carpenter to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The CaBcids culminate in tropical America, east and west ; and are curiously rare in the Pacific ocean. GM 62 LECTURES ON MOLLUSCA. Family VERMETIDJE. (Worm-Shells. ) On almost all shells and stones that have lain long in the sea are to be found irregularly twisted shells, sometimes assuming a more or less spiral form, sometimes almost straight. A large proportion of these have no connection with shell-fish : being true worms, the sea analogues of the earthy tribes : jointed animals with red bl...ood and symmetrical organs. When taken alive, these are recognized by the beautiful bunch of feelers, bearing an operculurn (sometimes adorned with stag's horn processes, and never spiral) on a fleshy cup in the middle. Some of these, , as the tiny Spirorbis, so prolific on sea weeds, stones, &c. , in the colder seas, have pretty regularly formed spiral shells. But in the tropical and warmer temperate regions, many species are found, the animal of which is not indeed so beauti- ful, but far more highly organized.
What to read after Lectures On Mollusca Or Shell Fish And Their Allies?
You can find similar books in the "Read Also" column, or choose other free books by Philip P Philip Pearsall Carpenter to read onlineMoreLess
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