A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . ably flattened ; peristome-field excavate, extending obliquely back-wards from the frontal border, widest anteriorly, the oral aperture situatedin the posterior and narrowest confines of this region, frequently followedby a well-developed pharyngeal passage; larger adoral cilia developed in astraight or oblique line on the left-hand margin of the peristome only,not encircling the mouth in
A manual of the Infusoria : including a description of all known flagellate, ciliate, and tentaculiferous protozoa, British and foreign, and an account of the organization and the affinities of the sponges . ably flattened ; peristome-field excavate, extending obliquely back-wards from the frontal border, widest anteriorly, the oral aperture situatedin the posterior and narrowest confines of this region, frequently followedby a well-developed pharyngeal passage; larger adoral cilia developed in astraight or oblique line on the left-hand margin of the peristome only,not encircling the mouth in a spiral manner; anal aperture posteriorlysituated ; no undulating membrane. Genus I. BURSARIA, Mliller. Animalcules free-swimming, broadly ovate, somewhat flattened on oneside, anteriorly truncate; peristome-field pocket-shaped, deeply excavate,situated obliquely on the anterior half of the body, having a broad oral fossain front, and a cleft-like lateral fissure, which extends from the left corner CILIA TA-HETEROTRICHA. 575 < ut—I p^ HO P^WH W < <:I—I u o wO Q - N ro i- lAvd ri ?s. 576 ORDER HETEROTRICHA. of the contour border to the middle of the ventral side; no tremulous flap;pharynx very long, funicular, bent towards the left, and forming animmediate continuation of the peristome excavation; adoral ciliary wreathvery broad, much concealed, lying completely within the peristome cleft;the cilia of general surface very fine, disposed in longitudinal rows; analaperture postero-terminal; endoplast band-like, cuived or sinuous ; con-tractile vesicles distinct, usually multiple. Inhabiting fresh water. By writers previous to the time of Stein and Claparbde and Lachmann thegenus Bursaria has been made to include a vast number of widely diverse infusorialfomis, now distributed, with one or two exceptions, among the genera Plagiotoma,Nydotherus, Leucophrys, Ophryogle?ia, Balantidium, Pammcecmm, and Opalina. _ Itthus happens that out of a score or more of animalcules as
Size: 1347px × 1854px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorkentwsavillewilliamsa, bookcentury1800, bookdecade1880
