Transactions of the American Microscopical Society Volume N . 38 (Paperback)


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. 1919 Excerpt: ...body not divided, or divided only by lateral bands. Anguilla, Trichina (Trichinella), Trichosoma, Pseudalius, Ichyonema, Mermis, Gordius and Sphaerularia. Butschli (1873) showed in the forms grouped as Holomyarii there is a separation of the ventral musculature due to the presence of th e ventral nerve cord, while he and others have shown that in the othe r members of the group one can find the typical longitudinal bands. As all of these members have many muscle cells in each quadrant they were placed in the first division and thus only two groups have resulted from Schneider's three (Textfig. N). However, this is not Textfigure N. Diagrammatic representation to illustrate the muscle cell arrangement described by Schneider, a, Polymyarii, b, Meromyarii. The lateral, dorsal and ventral bands are indicated. the only objection to the system. Gordius has no place in such a classification since it is not a member of the Class Nematoda. A very heterogenous mixture resulted from the combination of the first and last groups and even in the original scheme, worms which usually have been regarded as members of the same family or superfamily are further removed from each other than from those of different superfamilies or even tribes. Thus the genera Heterakis, Ascaris and Oxyuris are separated from each other altho Mermis and Filaria are associated with Ascaris. There is no regard for any general externa feature in this classification and it is conceded by most systematists that external features are very important in the separation of groups in most cases. Further it is evident that the structure of important organs of the nematodes is not considered by Schneider. In a recent work Hall (1916) names three families under the superfamily Strongyloidea, two of which, St...

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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. 1919 Excerpt: ...body not divided, or divided only by lateral bands. Anguilla, Trichina (Trichinella), Trichosoma, Pseudalius, Ichyonema, Mermis, Gordius and Sphaerularia. Butschli (1873) showed in the forms grouped as Holomyarii there is a separation of the ventral musculature due to the presence of th e ventral nerve cord, while he and others have shown that in the othe r members of the group one can find the typical longitudinal bands. As all of these members have many muscle cells in each quadrant they were placed in the first division and thus only two groups have resulted from Schneider's three (Textfig. N). However, this is not Textfigure N. Diagrammatic representation to illustrate the muscle cell arrangement described by Schneider, a, Polymyarii, b, Meromyarii. The lateral, dorsal and ventral bands are indicated. the only objection to the system. Gordius has no place in such a classification since it is not a member of the Class Nematoda. A very heterogenous mixture resulted from the combination of the first and last groups and even in the original scheme, worms which usually have been regarded as members of the same family or superfamily are further removed from each other than from those of different superfamilies or even tribes. Thus the genera Heterakis, Ascaris and Oxyuris are separated from each other altho Mermis and Filaria are associated with Ascaris. There is no regard for any general externa feature in this classification and it is conceded by most systematists that external features are very important in the separation of groups in most cases. Further it is evident that the structure of important organs of the nematodes is not considered by Schneider. In a recent work Hall (1916) names three families under the superfamily Strongyloidea, two of which, St...

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Product Details

General

Imprint

Rarebooksclub.com

Country of origin

United States

Release date

May 2012

Availability

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First published

May 2012

Authors

Dimensions

246 x 189 x 6mm (L x W x T)

Format

Paperback - Trade

Pages

112

ISBN-13

978-1-235-99244-5

Barcode

9781235992445

Categories

LSN

1-235-99244-6



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