Synopses & Reviews
Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Unio Abyssinicus von Martens. Shell solid, irregularly ovate or subtriangular, inflated, inequilateral; beaks full and high, sculptured with a few small tubercles; hinge line curved; anterior end rounded; base line evenly curved, full at or behind the middle in young shells, becoming nearly straight in old ones; posterior ridge full, slightly double below, ending below the median line in a narrow, faint biangulation; surface lightly, concentrically sculptured, the anterior part roughened, the dorsal slope with a few broken plications; epidermis olive-yellow, with obscure bands; pseudo- cardinals strong, multisulcate; laterals solid; nacre flesh-colored. Length (adult) 70, height 43, diam. 32 mm. Length (young) 56.5, height 38.5, diam. 28 mm. Frana Lake, Abyssinia. Unto abyssinicus Von Martens, Mai. HI., XIII, 1866, p. 102.? Jickeu, Faun. Moll. X. O. Af., 1874, p. 278, pi. ix, fig. 5; pi. x, fig. 10. Xodularia abyssinica Simpson, Syn. 1900, p. 826. A decidedly heavy shell, which appears to be close to U. dembcce but is shorter, more solid and somewhat triangular. In the young shells the base is well rounded and the general outline is at most regularly oval, but the base line becomes almost straight with age and it is quite probable that very old shells may have the posterior point drawn down a little. Jickeli refers this species to Unio habessinicits Henglin, in Reise nach Abess., p. 290. This publication is not accessible to me and I do not know whether this is a mere notnen nitdttm or if it be accompanied with a description, von Martens describes it as a new species in the Mai. Rlatter under the name of abyssinicus. Unio Moncbti Bonrguignat. Shell somewhat elongated, rhomboid, inflated, subsolicl, quite inequilateral; beaks only moderately full, with s...
Synopsis
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