File:The American monthly microscopical journal (1882) (17971518940).jpg

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Title: The American monthly microscopical journal
Identifier: americanmonthlym31882newy (find matches)
Year: 1880 (1880s)
Authors:
Subjects: Microscopy
Publisher: New York : Romyn Hitchcock
Contributing Library: MBLWHOI Library
Digitizing Sponsor: Biodiversity Heritage Library

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1882.) MICROSCOPICAL JOURNAL. 103 crop, are composed of two sharp, slender hooks, with about four slen- der, straight teeth at the inner base. The stomach is large, and the in- testine very small and short, opening on the ventral surface of the body near the posterior end. C. bucinedax, sp. nov. The body is a coriaceous, flattened sac, minutely roughened over the whole surface, nearly as broad as long, and about three-fourths as thick. The dorsal out- line is longest and strongly convex, the ventral being usually somewhat concave. The cup is oblique, the ventral height being little more than half the dorsal. Its lower wall usually presents a shallow, -longitudinal con- cavity, so that the aperture is slightly kidney-shaped. The surface of the cup is more delicately roughened than the body, and its edge is minutely erose. In an average specimen the length of the body, without the cup, was o.i6-in., and its width 0.014-in. This rotifer has no means of at- tracting its prey or bringing it within reach, but depends wholly on such animals as chance to swim into its oval cup. When a stentor or other animalcule of considerable size enters the trap, the rotifer quickly puckers up the aperture and contracts the walls of the cup upon it, until it is forced, with a sudden slip, into the ample cavity of the pharynx. This apparatus enables it to secure much larger prey than the usual ciliated structure ; but, in the absence of lo- comotor organs, it can only live in water swarming with suitable food. In the aquarium mentioned it was living almost wholly on the large stentors. Measurement of tlie Power of Oculars. Mr. W. H. Bulloch has devised a simple apparatus for measuring the magnifying power of oculars, which is illustrated in fig. t,2>- I^ consists of an ordinary microscope with an ob-
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Source https://www.flickr.com/photos/internetarchivebookimages/17971518940/
Author Internet Archive Book Images
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Volume
InfoField
v. 3 (1882)
Flickr tags
InfoField
  • bookid:americanmonthlym31882newy
  • bookyear:1880
  • bookdecade:1880
  • bookcentury:1800
  • booksubject:Microscopy
  • bookpublisher:New_York_Romyn_Hitchcock
  • bookcontributor:MBLWHOI_Library
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:115
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
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27 May 2015

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