A Laboratory Course In Invertebrate Zoã¶loy

Paperback | February 6, 2012

byHermon Carey Bumpus

not yet rated|write a review
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. 1893. Excerpt: ... THE LOBSTER1 (Homarus americanus). External Anatomy.--Is the animal perfectly "bilaterally symmetrical "? What characters distinguish the anterior portion of the animal from the posterior? It will be observed that the latter, the abdomen, is segmented. Look carefully and see if there are traces of segmentation in the anterior portion, the cephalothorax. Is the number of abdominal segments constant? Has each abdominal segment a pair of appendages? Do they all take their origin from similar points of the several segments? The ventral piece lying between each pair of appendages is called the sternum. The dorsal portion is the tergum. The ventrally projecting lateral lobes are the pleurons. The epimeron is a piece, more clearly seen on the first abdominal segment, that lies ventrally between the appendage and the pleuron. Note any specialization of any abdominal segment and, if possible, give a reason for the same. 1 The lobster has been here introduced for several reasons.--Its generalized structure, large size, and the easiness with which its organs may be dissected make it a most convenient animal for the demonstration of not only arthropod morphology, but of general Invertebrate anatomy. It is, moreover, a typical crustacean, and in a shorter course might be studied as a representative of the entire Class. The Crustacea considered farther on are especially valuable for comparative study. Is there anything to show that the last cephalothoracic appendage is homologous with the abdominal appendages? The latter have been called pleopoda. If the homology can be shown for the last, it must also be claimed for the remaining cephalothoracic appendages of equivalent origin and structure. How many such appendages are there? (Answer the question by comparing points ...

Pricing and Purchase Info

$19.95

Out of stock online

From the Publisher

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. 1893. Excerpt: ... THE LOBSTER1 (Homarus americanus). External Anatomy.--Is the animal perfectly "bilaterally symmetrical "? What characters dist...

Format:PaperbackDimensions:42 pages, 9.69 × 7.44 × 0.09 inPublished:February 6, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217155308

ISBN - 13:9780217155304

Look for similar items by category:

Customer Reviews of A Laboratory Course In Invertebrate Zoã¶loy

Reviews