The Cretaceous Mollusca of South Australia and the Northern Territory

The Cretaceous Mollusca of South Australia and the Northern Territory

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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. 1902 edition. Excerpt: ...p. 469, t. 34, f. 11. Obs.--A third Nucula, larger than either of those provisionally referred to N. truncata (?) is almost entirely devoid of test. The cast is elongately trigonal, tumid, with incurved beaks, a lunule similar to that of N. truncata (?), pronounced adductor scars, particularly the anterior, no umbonal scars, but a thick test, about six narrow cardinal teeth beneath the umbones, a number of posterior teeth, and a strong posterior slope. This may be N. Cooperi, but I do not wish to commit myself to a definite determination. In his notes Prof. Tate suggests that N. Cooperi and N. truncata are identical, and I am much inclined to regard them so. The brevity of Moore's descriptions has rendered it almost impossible to recognise some of his species, this amongst the number. Loc.--Lake Eyre Basin (Tate). Hor.--Lower Cretaceous. Obs.--Two other specimens forwarded to me by Prof. Tate seem to materially differ from those referred to N. quadrata by a less degree Of tumidity. The outline resembles that of the latter, but the adductor scars are not definitely present. There are eight posterior teeth, but the cardinal and anterior teeth are but imperfectly visible, and the presence of a chondrophore is by no means certain. The surface is faintly radiately striate. There is the possibility that these may be small examples of Nucula gigantea, Eth., if the latter is really distinct from N. quadrata. Loc.--Lake Eyre Basin (Tate). H0'r'.--Lower Cretaceous. Colln.-Tate. Obs.--Several examples in different states of preservation are in Prof. Tate's collection. partly testaceous, partly internal casts, or more or less embedded in matrix. I have lately described this species (as Malletia, Randsi) in detail, and it is sufficient to...show more

Product details

  • Paperback
  • 189 x 246 x 1mm | 64g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236894219
  • 9781236894212