A Text-Book of Invertebrate Morphology
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In our eReader you can find the full English version of the book. Read A Text-Book of Invertebrate Morphology 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 A Text-Book of Invertebrate Morphology
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A chain of six pairs of ganglia lying in the abdomen is connected with the cephalothoracic series and innervate the abdominal appendages.
TYPE CBU8TA0EA.
431 As already noticed, a pair of simple eyes are borne upon the dorsal surface of the carapace, one on each side of the median line, while a pair of larger compound eyes are situated lat- erally. The structure of these compound eyes is peculiar (Fig. 197). Over their surface the cuticle is considerably thickened and shows upon the outer surfa...ce no indication of corneal facets, but its inner surface is prolonged into a num- ber of papillae (?) each one of which projects into a depression of the ectoderm. At the bottom of each depression is a bulb- FiG. 197. — Compound Eye of Limulm polyphemus. Two Ommatidia (after Watase).
c = central cell. ma = mesoderm.
I = lens. opn = optic nerve.
rt = retinula.
like structure composed of a number of cells arranged in a circle and constituting a retinula {rt), the lower ends of the cells being continued inwards to form part of the optic nerves {opn).
What to read after A Text-Book of Invertebrate Morphology?
You can find similar books in the "Read Also" column, or choose other free books by J Playfair James Playfair Mcmurrich to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A chain of six pairs of ganglia lying in the abdomen is connected with the cephalothoracic series and innervate the abdominal appendages.
TYPE CBU8TA0EA.
431 As already noticed, a pair of simple eyes are borne upon the dorsal surface of the carapace, one on each side of the median line, while a pair of larger compound eyes are situated lat- erally. The structure of these compound eyes is peculiar (Fig. 197). Over their surface the cuticle is considerably thickened and shows upon the outer surfa...ce no indication of corneal facets, but its inner surface is prolonged into a num- ber of papillae (?) each one of which projects into a depression of the ectoderm. At the bottom of each depression is a bulb- FiG. 197. — Compound Eye of Limulm polyphemus. Two Ommatidia (after Watase).
c = central cell. ma = mesoderm.
I = lens. opn = optic nerve.
rt = retinula.
like structure composed of a number of cells arranged in a circle and constituting a retinula {rt), the lower ends of the cells being continued inwards to form part of the optic nerves {opn).
What to read after A Text-Book of Invertebrate Morphology?
You can find similar books in the "Read Also" column, or choose other free books by J Playfair James Playfair Mcmurrich to read onlineMoreLess
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