Text-Book of the Embryology of Invertebrates
Text-Book of the Embryology of Invertebrates
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Brachyura, III. Stomatopoda.
IV. Cumacea.
c, Abthrostraca (Edriophthalmata).
I. Anisopoda (Tanais, Apseudes), II. Isopoda.
III. Amphipoda.
The Development of the Embryo.
1. Oriposition, Care of the Brood.
The eggs of the Crustacea are, as a rule, spherical in fonn, although in a few cases they are somewhat ellipsoidal (Oniseut^ Gammaru8, Ligia, Palaemon, Atyephyra, Orangorij etc). Where the Digiti zed by Google OVIPOBITION, CARE. OF TBB BROOD. 105 eggs are crowded together in a brood-cavity (e....g,, in the Arthro- straca), their shape, during the first stages of development, may be rather irregular, on account of mutual pressure.
It has been observed that, in various Crustacea, the female under- goes ecdysis before laying the eggs. This is the case with some Cladocera before the laying of the summer eggs (Jurine, Grobbsn), also with Gammarus (Dblla Yallb) and Atyephyra (Ischikawa).
The adaptations for the protection of the eggs vary greatly. The eggs are laid singly (Gypris among the Ostracoda and CetochiluSy DiaSy Centrqpages among the Gopepoda), or in bands (Argiilus), or united into masses (Stomatopoda).
What to read after Text-Book of the Embryology of Invertebrates?
You can find similar books in the "Read Also" column, or choose other free books by Korschelt, E. (Eugen), B. 1858 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Brachyura, III. Stomatopoda.
IV. Cumacea.
c, Abthrostraca (Edriophthalmata).
I. Anisopoda (Tanais, Apseudes), II. Isopoda.
III. Amphipoda.
The Development of the Embryo.
1. Oriposition, Care of the Brood.
The eggs of the Crustacea are, as a rule, spherical in fonn, although in a few cases they are somewhat ellipsoidal (Oniseut^ Gammaru8, Ligia, Palaemon, Atyephyra, Orangorij etc). Where the Digiti zed by Google OVIPOBITION, CARE. OF TBB BROOD. 105 eggs are crowded together in a brood-cavity (e....g,, in the Arthro- straca), their shape, during the first stages of development, may be rather irregular, on account of mutual pressure.
It has been observed that, in various Crustacea, the female under- goes ecdysis before laying the eggs. This is the case with some Cladocera before the laying of the summer eggs (Jurine, Grobbsn), also with Gammarus (Dblla Yallb) and Atyephyra (Ischikawa).
The adaptations for the protection of the eggs vary greatly. The eggs are laid singly (Gypris among the Ostracoda and CetochiluSy DiaSy Centrqpages among the Gopepoda), or in bands (Argiilus), or united into masses (Stomatopoda).
What to read after Text-Book of the Embryology of Invertebrates?
You can find similar books in the "Read Also" column, or choose other free books by Korschelt, E. (Eugen), B. 1858 to read onlineMoreLess
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