Text-Book of Comparative Anatomy Pt. 2
Text-Book of Comparative Anatomy Pt. 2
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In our eReader you can find the full English version of the book. Read Text-Book of Comparative Anatomy Pt. 2 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 Text-Book of Comparative Anatomy Pt. 2
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rp, Ocellar pores in the fused radials ; mj), ▼entricosa, Lamk. (after Lov^n). For pores of the madreporite in a branched furrow. For lettering see p. 317.
lettering see p. 317.
genital pores have wandered out of the apical system ; they lie either at its edge, or further removed in the sutures between the (paired) rows of interradial plates.
c. Spatangoida. The apical system of these exocyclic £chinoids is much reduced iu extent, although not so much so as that of the ClypcaMroida. It varies m...uch in detail, and in a few extreme forms {e.g. Pourtalesia) the piimitive condition is to a very great extent obliterated and destroyed.
1. In many geologically ancient forms the influence of the wandering of the anus ont of the apical system is seen in the disappearance of the posterior basal plate (together with the genital pore belonging to it), and in the absence of a central plate.
The other ]>asals and the radials (each of which has its pore) have all shifted, and occupy an area which is sometimes circular or almost regularly pentagonal, sometimes lengthened in the direction of the plane of symmetry.
What to read after Text-Book of Comparative Anatomy Pt. 2?
You can find similar books in the "Read Also" column, or choose other free books by Haeckel, Ernst Heinrich Philipp August, 1834-1919 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
rp, Ocellar pores in the fused radials ; mj), ▼entricosa, Lamk. (after Lov^n). For pores of the madreporite in a branched furrow. For lettering see p. 317.
lettering see p. 317.
genital pores have wandered out of the apical system ; they lie either at its edge, or further removed in the sutures between the (paired) rows of interradial plates.
c. Spatangoida. The apical system of these exocyclic £chinoids is much reduced iu extent, although not so much so as that of the ClypcaMroida. It varies m...uch in detail, and in a few extreme forms {e.g. Pourtalesia) the piimitive condition is to a very great extent obliterated and destroyed.
1. In many geologically ancient forms the influence of the wandering of the anus ont of the apical system is seen in the disappearance of the posterior basal plate (together with the genital pore belonging to it), and in the absence of a central plate.
The other ]>asals and the radials (each of which has its pore) have all shifted, and occupy an area which is sometimes circular or almost regularly pentagonal, sometimes lengthened in the direction of the plane of symmetry.
What to read after Text-Book of Comparative Anatomy Pt. 2?
You can find similar books in the "Read Also" column, or choose other free books by Haeckel, Ernst Heinrich Philipp August, 1834-1919 to read onlineMoreLess
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