Memoirs of the Museum of Comparative Zool Ogy at Harvard College Volume 10

Memoirs of the Museum of Comparative Zool Ogy at Harvard College Volume 10

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ...1872). The types of De Saussure's species, C. consobrinus from Cuba, C. Aztecus and C. Montezumoe from Mexico, were also examined by Hagen in Berlin. When the Monograph of the North American Astacidae was written, Hagen had seen no specimens from Cuba or Mexico, and he fell into the error of supposing that the peculiar species C. Montezum was the same as Erichson's C. Mexicanus. This mistake was rectified on seeing Saussure's types. C. consobrinus: "Saussure's types, two females, dry. A peculiar species, or a young state of C. Cubensis. Rostrum bidentate." C. Aztecus: Saussure's types. The male, first form, and female, from Mexico, seem to be C. Mexicanus Erichs., with nearly cylindrical hands. The second form, with more flattened hands, belongs alone, then, to Saussure's C. Aztecus. In the second form the antenna scale is more broadly truncate at the end, and the rostrum is a little different These differences are not striking enough, however, to preclude the specific identity of the two forms. Of the species of Cambarus described by American authors before the date of Hagen's Monograph, but few types are extant. The oldest known to me are Harlan's, 1830, 1835 A. Blandingii Har., A. Bartoni i Fab., A. affinis Say), preserved in the collection of the Academy of Natural Sciences of Philadelphia. In 1850, Professor Lewis R. Gibbes enumerated, without describing, four species of Cambarus under the names Astacus Bartoni i Fab., A. affinis Say, A. Blandingii Harlan, and A. peUucidus Tellk. Several specimens labelled by Gibbes in the collection of the Philadelphia Academy and in the Museum of Comparative Zoology prove that his identifications were often incorrect, and consequently the localities given by him cannot be taken more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • United States
  • English
  • black & white illustrations
  • 1236909844
  • 9781236909848