Manual of Conchology; Structural and Systematic. with Illustrations of the Species Volume 11

Manual of Conchology; Structural and Systematic. with Illustrations of the Species Volume 11

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ...there are still more. Thme lirae on my specimens are scarcely granulate to speak of, but the interstices are crowded with growth-lines. The base, which distinguishes this species from T. rigatus and T. calliferus, is pretty flat, with 8 smooth concentric lirae, of which the broad interstices are very prettily punctate, or rather divided into little pits. The umbilicus is moderately wide, and opens out like a funnel, and is sharply hounded by the innermost rib of the base. The aperture is lower than broad, rather quadrangular; the outer lip and throat are sulcate; the columella is produced, and ends in an acute tooth. The color is white, with brown dots, which often, especially on the base, coalesce into streaks. Alt. 11, diam. 15 mill. (Philippi.) West Coast of Australia. Shell perforate, conoid-depressed, rather thin; color very variable, whitish-hull' or rosy, brown reddish, ornamented with rosy maculations and narrow spiral lines articulated with white; transversely delicately sulcate, the sulci exquisitely decussated by incremental striae; whorls 6, slightly convex, the first buff, the remainder subangulate; last whorl dilated, slightly subangular in the middle, convex beneath and_ very finely decussated; aperture subovate, delicately sulcate within; columella arcuate; columellar callous thick, semicircular, yellowish or livid-green, almost covering the umbilicus. Alt. 11, diam. 14 mill. (Fischer) Id. of L' /bu, Loyalty Archipelago. 'Easily to be distinguished from T. calliferus by the thin shell, fine sculpture, and colored columellar callous. The example figured is about double the size of the other specimens seen, according to Dr. Fischer. Shell minute, low ovate-conic, thin, amply umbilicated, ashy white, more

Product details

  • Paperback | 168 pages
  • 189 x 246 x 9mm | 313g
  • United States
  • English
  • black & white illustrations
  • 1236913426
  • 9781236913425