Thesaurus Conchyliorum or Monographs of Genera of Shells Volume 3

Thesaurus Conchyliorum or Monographs of Genera of Shells Volume 3

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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. 1866 edition. Excerpt: ...inclinato, costis radiantibus, iu qualibus aculeato-asperis, interstitiis lineis elevatis transversis clathratis; apertur margine denticulato, antice inciso, fissura brevi subquadrata. Obs. This resembles the sharper and younger specimens of E. rugosa, but all the radiating ribs in the anterior half of the shell are equal. 60. stellAtA (f. 103), A. Adams.--Solidula, albida, elliptica, depresso-conica, apice subcentrali; costis elevatis, subspinulosis, radiantibus; interstitiis costellis et striis crebris decussantibus, exasperatis; apertura margine dentato, sinu sublaterali, intus in canalem apicem versus producto. Obs. This differs from any of the varieties of E. rugosa in the production of the ribs at their marginal termination, and the greater coarseness of the sculpture generally. 61. Sulcifera (f. 84, 85), A. Adams.--Ovalis, depresso-conica, viridescens, vertice obtuso, ad partem posteriorem posito; costellis radiantibus, interstitiis haud quantibus, et striis incrementi ornatis, basi arcuata; apertura margine crenulato, incisura haud profunda sublaterali, intus in canalem producta. Obs. In the one-sided position of the notch in this one species G. B. S. does not see a sufficient reason for the erection of a separate genus. 62. notAtA (f. 86, 87, 88), Linn.--Ovalis, depressa, cinerea, nigro lineata et maculata; apice postico, obtuso; costis radiantibus nigris, rugosis, in qualibus; margine antico vix emarginato, intus cicatrice inconspicua. Obs. In this species the fissure has been filled up almost or quite to the margin, and is only perceptible by a slight notch and an inconspicuous cicatrix. Genus SCUTUS, Montfort. Parmophorus, Scutellite, Dascinum, ...
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Product details

  • Paperback | 154 pages
  • 189 x 246 x 8mm | 286g
  • United States
  • English
  • black & white illustrations
  • 1236738772
  • 9781236738776