The Annals and Magazine of Natural History, Zoology, Botany and Geology; Incorporating the Journal of Botany Volume 3

The Annals and Magazine of Natural History, Zoology, Botany and Geology; Incorporating the Journal of Botany Volume 3

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 edition. Excerpt: ...during this time the Kerona had been nourished with glue so successfully that they not only attained their full development, but multiplied themselves to an incalculable degree by fissiparation and budding, and in many instances presented the early stages--viz. the shortening, &c.--of encapsulation, which may reasonably be inferred to have been completed, though I did not meet with any of the cysts--thus arriving at the state which must have led to metamorphosis, under the continued nourishment that was afforded them, long before this was withdrawn, --yet not a single Plcesconia of any kind was observed among this group throughout the whole experiment. All things considered, then, the above statements rather throw a doubt over, than confirm, the conclusions of M. J. Haime respecting the metamorphosis of Oxytricha into Trichoda Lynceus. EXPLANATION OF PLATE VI. Fig. 1. Plasconia truncata, Ehr., filled with embryonic cells, lateral view, right side: a, anterior wreath of cilia resting on prolonged under lip; b, anterior legs; c, gill; d, posterior legs, cleft. Fig. 2. Ditto, dorsal view. Here the gill, together with parts of the legs and the contracting vesicle, are faintly seen through the other parts: a, under Up; b, contracting vesicle and anal orifice. Fig. 3. Ditto, ventral view, without embryonic cells, but presenting algal cells and hepatic globules in the abdominal cavity, --the former indicated by their oval form, large size, and dark colour (having been taken in for food), and the latter by being colourless and circular; these, together with the sarcode, form the contents of the abdominal cavity: a, triangular depression leading to b, the oral orifice, through which an algal cell is represented in the act of being conveyed into the.
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Product details

  • Paperback | 226 pages
  • 189 x 246 x 12mm | 413g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236669568
  • 9781236669568