Image from page 340 of “The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa” (1903) – more Marine Life goodness curated by www.SardineRunPE.co.za
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Title: The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa
Year: 1903 (1900s)
Authors: Moore, John Edward S
Subjects: Zoology Marine animals Freshwater animals
Publisher: London, Hurst and Blackett, limited
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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Fig. 32.—Semi diagram of the digestivesystem of Tanganyicia riifojilosa. and connectives, are all arranged in the typical cerithoidplan, just as in Typhobia or Cancellaria. But thereis in the brain of Tanganyicia a curious median lobesituated between the cerebral ganglia and looking forward,which I have never found elsewhere. Except for theaddition of the large rectal gland in the female Tanganyicia,and the reduction of the buccal mass in both sexes, thewhole alimentary canal (Fig. 32) is built on precisely the 250 THE TANGANYIKA PROBLEM. same form as in Typhobia and all the rest of the halolimnicmolluscs that we have considered, and as it is with thealimentary canal, so it is with the rest of the animalsvisceral anatomy. NASSOPSIS, SMITH. N. NASSA (l-Kl. l^^). During life this mollusc inhabits the surface rocks ofTanganyika, and its shells are always richly encrusted withthe green algae which clothe the rocks for a consider-able depth. It is sluggish, and appears to browse within a
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