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Taxonomic studies on the hydras of North America. 6, Description of Hydra hymanae, new species. American Museum novitates ; no. 1423

Show simple item record Hadley, Charles Elmer, 1893- en_US Forrest, Helen, zoologist. en_US 2005-10-06T17:33:43Z 2005-10-06T17:33:43Z 1949 en_US
dc.description 14 p. : ill. ; 24 cm. en_US
dc.description Includes bibliographical references (p. 13-14). en_US
dc.description.abstract "Hydra hymanae, new species, is a hydra of medium size, with short tentacles. It is usually found in very rapidly moving water. Its identifying characters are: column 7 to 12 mm. in length, not differentiated into body and stalk but with base bent in the form of a hook; habit of standing partly contracted, with the main portion of the column approximately parallel with the substratum; tentacles usually six in number, about one-half the length of the column, extended in drooping positions; broadly oval, large glutinants with a beak-like projection at the pointed end; unusually large penetrants and volvents; hermaphroditic; testes few, roughly hemispherical, with or without nipples; season of sexual activity October, Novemeber, December; embryo flattened and enclosed in a plano-convex, spined theca attached to the substratum; habitat occasionally still water, more often rapidly moving water. The type locality is Little Falls, New Jersey. Other localities are Verona, Delawanna, Lake Valhalla, all in New Jersey"--P. 13. en_US
dc.format.extent 1158721 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 1423 en_US
dc.subject.lcc QL1 .A436 no.1423, 1949 en_US
dc.subject.lcsh Hydra hymanae -- Classification. en_US
dc.subject.lcsh Hydra -- New Jersey -- Classification. en_US
dc.subject.lcsh Cnidaria -- New Jersey -- Classification. en_US
dc.title Taxonomic studies on the hydras of North America. 6, Description of Hydra hymanae, new species. American Museum novitates ; no. 1423 en_US
dc.title.alternative Description of Hydra hymanae en_US
dc.title.alternative Hydras of North America en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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