File:The biology of the amphibia (1931) (20388604361).jpg

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Title: The biology of the amphibia
Identifier: biologyofamphibi00nobl (find matches)
Year: 1931 (1930s)
Authors: Noble, Gladwyn Kingsley, 1894-1940
Subjects: Amphibians
Publisher: New York : McGraw-Hill
Contributing Library: ASC - York University Libraries
Digitizing Sponsor: York University - University of Toronto Libraries

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RELATION OF AMPHIBIA TO THEIR ENVIRONMENT 439 diemyctyli (Fig. 138) that it may be used as a ready source of supply for class-room demonstration of this parasite (Hegner, 1920). The integument of aquatic Amphibia frequently supports a rich protozoan fauna. Wenrich (1924) reports one flagellate and seven ciliates from the skin of tadpoles, and Sassuchin (1928) has added a list of species which he has found in the slime of the tadpole skin. Under laboratory conditions Cryptobranchus
Text Appearing After Image:
Fig. 138.—Trypanosoma di- Fig. 139.—Opalina ranarum, a ciliate parasite emyctyli. (After Nigrelli.) of frogs. (After Metcalf.) frequently develops a rich growth of Vorticella, and various free- swimming ciliates may be found in the mucous secretion of the integument. These in themselves do not appear to be patho- genic but they are often accompanied by a growth of mold which causes great injury. Among the ciliates in the intestines of tadpoles and frogs the opalinids are perhaps the most common. These have a ciliated body, several nuclei, but no mouth. Although they may reach a diameter of nearly a millimeter, they apparently do little dam- age to the body of their host. Opalinids (Fig. 139) are found in

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  • bookid:biologyofamphibi00nobl
  • bookyear:1931
  • bookdecade:1930
  • bookcentury:1900
  • bookauthor:Noble_Gladwyn_Kingsley_1894_1940
  • booksubject:Amphibians
  • bookpublisher:New_York_McGraw_Hill
  • bookcontributor:ASC_York_University_Libraries
  • booksponsor:York_University_University_of_Toronto_Libraries
  • bookleafnumber:457
  • bookcollection:YorkUniversity
  • bookcollection:ontario_council_university_libraries
  • bookcollection:toronto
  • BHL Collection
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7 August 2015
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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