The Crayfish : An Introduction to the Study of Zoology
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In our eReader you can find the full English version of the book. Read The Crayfish : An Introduction to the Study of Zoology 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 The Crayfish : An Introduction to the Study of Zoology
What reading level is The Crayfish : An Introduction to the Study of Zoology book?
To quickly assess the difficulty of the text, read a short excerpt:
1 = 4 XIII. ...
. 1 = 4 XIV. ...
.
. .
. 1 = 1 6 + cp. + 21 + ep.
In the lobster, the solitary arthrobranchia of the eighth somite disappears, and the branchiae are reduced to twenty on each side. ^ In Astacus, this branchia remains ; but, in the English crayfish, the most anterior of the pleurobranchite has vanished, and mere rudiments of the two next remain.
It has been mentioned that other Astuci present a rudiment of the first pleurobranchia.
266 THE COMPARATIVE MORPHOLOGY OF THE CRAYFISH.
...The branchial formula of Astacus.
Somites and Arthrobranchise.
their Podo- ^— ' Plenro- Appendages. branchial. Anterior. Posterior, branchiae.
vir. .
. (ep.) ..
...
...
= (ep.) VIII. .
.. 1 ...
= 2 IX. .
.. 1 ... 1 = 3 x. .
.. 1 ... 1 = 3 XI. .
.. 1 ... 1 or ?• = 3 or 3 + r XII. .
.. 1 ... 1 r = 3 + r XIII. .
.. 1 ... 1 r = 3 + r XIV. .
.
..
...
1 = 1 G + ep + 6 + 5 + 1 l-2oi Si = 18 + cp. + 2or3r.
In Cambarus, the number of the branchiae is reduced to seventeen by the disappearance of the last pleuro- branchia ; while, in Astacoides, the process of reduction is carried so far, that only twelve complete branchiae are left, the rest being either represented by mere rudiments, or disappearing altogether.
What to read after The Crayfish : An Introduction to the Study of Zoology?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1 = 4 XIII. ...
. 1 = 4 XIV. ...
.
. .
. 1 = 1 6 + cp. + 21 + ep.
In the lobster, the solitary arthrobranchia of the eighth somite disappears, and the branchiae are reduced to twenty on each side. ^ In Astacus, this branchia remains ; but, in the English crayfish, the most anterior of the pleurobranchite has vanished, and mere rudiments of the two next remain.
It has been mentioned that other Astuci present a rudiment of the first pleurobranchia.
266 THE COMPARATIVE MORPHOLOGY OF THE CRAYFISH.
...The branchial formula of Astacus.
Somites and Arthrobranchise.
their Podo- ^— ' Plenro- Appendages. branchial. Anterior. Posterior, branchiae.
vir. .
. (ep.) ..
...
...
= (ep.) VIII. .
.. 1 ...
= 2 IX. .
.. 1 ... 1 = 3 x. .
.. 1 ... 1 = 3 XI. .
.. 1 ... 1 or ?• = 3 or 3 + r XII. .
.. 1 ... 1 r = 3 + r XIII. .
.. 1 ... 1 r = 3 + r XIV. .
.
..
...
1 = 1 G + ep + 6 + 5 + 1 l-2oi Si = 18 + cp. + 2or3r.
In Cambarus, the number of the branchiae is reduced to seventeen by the disappearance of the last pleuro- branchia ; while, in Astacoides, the process of reduction is carried so far, that only twelve complete branchiae are left, the rest being either represented by mere rudiments, or disappearing altogether.
What to read after The Crayfish : An Introduction to the Study of Zoology?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
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