Bulletin of the American Museum of Natural History Volume 38

Bulletin of the American Museum of Natural History Volume 38

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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. 1918 edition. Excerpt: ...XXXII, p. 309. Over a hundred specimens from several localities in the east and the west; most specimens from the town of Rio Grande. The range of variation in this large series is very small, and nothing more than has already been described by several authors, most recently by Ruthven (1912, p. 309). The sexually mature males are readily distinguishable from the females by the numerous, low, spiny tubercles on the back. This rugosity is correlated only with sex. It is not to be confused with the rugosity caused by external factors. Such rugosity occurs in several species of EIOuthz'r0dactylus and Leptodactylus; and, as we have shown above, is probably due to the influence of the environment. A rather varied diet was found in the few stomachs examined. This consisted chiefly of large cockroaches. Such insects were to be expected, since the majority of these giant toads were taken around street lamps in the town of Rio Grande. Three specimens from eastern Nicaragua, one from each of the following localities: Cupitna Camp, Kanawa, and Maselina Creek. The type specimen (U. S. N. M., 4335) of this species was collected in Turbo, Colombia. It is larger than any of our specimens and differs in having more tubercles on the back. These tubercles 'are less pointed than in our specimens. There is apparently no other difference between our specimens and the type. Our largest specimen measures only 49 mm. from snout to vent. None of the specimens are sexually mature. In alcohol, these three toads appear nearly uniform gray with a slight indication of a darker pattern; in life, they were very different. The dorsal ground tone was bright leaf-green with velvety dark gray, almost black, markings, tending to form a A-shaped mark on the pectoral region...show more

Product details

  • Paperback
  • 189 x 246 x 13mm | 458g
  • Rarebooksclub.com
  • English
  • Illustrations, black and white
  • 1236917367
  • 9781236917362