This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...transparent, more or less reticulated on all or part of the surface. Head large, more or less beaked. Superior antennae very small. Inferior antennae strong and long. The superior antennae have five small setae at the apex, while the inferior pair are armed with the usual complement of sete, which in this ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...transparent, more or less reticulated on all or part of the surface. Head large, more or less beaked. Superior antennae very small. Inferior antennae strong and long. The superior antennae have five small setae at the apex, while the inferior pair are armed with the usual complement of sete, which in this species are finely plumose. The'color of this animal, which is our commonest and one of the largest species, is dependent upon the food taken into the stomach, which extends through nearly the whole length of the body in all the species. When feeding upon clean vegetation the intestinal canal is of a brilliant green hue, while at other times it is dark or brownish. In England they are often of a bright red color throughout, but I have never met with such here. The carapax is terminated posteriorly by a serrated spine, which is variously situated, and varies also with the age of the animal. In one variety the spine is situated at the upper posterior angle while in others it springs from the centre of the posterior aspect. In the young the spine is long, almost equaling sometimes the earapax in length, but at each successive moulting the spine is found to be shorter. The upper part of the body has four projections, one of which is longer than the others and serves evidently to keep the ova in position. Dr. Baird says that " the male is much smaller than the female," which is the case in nearly all the species, "and the superior antennae are much larger and spring from under the beak instead of from the beak itself. The inferior extremities of the valves are more densely serrated than in the female." The males are always fewer than the females. The motions of this 'creature are quick, spasmodic leaps through the water, and it often present a...
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Add this copy of Microscopic Entomostraca to cart. $47.03, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.
