Palaeontographical Society Monographs Volume 12, No. 50 - V. 13, No. 58

Palaeontographical Society Monographs Volume 12, No. 50 - V. 13, No. 58

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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. 1858 edition. Excerpt: him to possess animals so different in their anatomical details that they could not, in his opinion, be confounded under the same specific denomination; and it has been shown, by other similar investigations, that shells presenting a wide range of external modifications of detail possessed an animal exactly similar. This demonstrates the almost impossibility of very often determining among the extinct forms what in reality belongs to the same species; and our appreciations must therefore be always more or less uncertain, however much zeal we may display in ' our attempt to dive into the veiled secrets of nature. Professor M'Coy was mistaken while stating, at p. 151 of his ' Synopsis of the Carboniferous Fossils of Ireland, ' that the internal structure of R. acuminata was similar to that of T. fiaatata, the one being a R/tyne/zonella, the other a Terebratula; but his imperfect woodcut representation (fig. 32 of the ' Synopsis') would denote that the Professor had observed the two small curved supports of the oral arms in R/zync/zonella acuminata. In Pl. XX, fig. 6, the reader will find a more complete representation of the interior of the dorsal valve, and the two woodcuts given above show the shape of the muscular and vascular impressions. _ Lac. R. acuminata and its varieties abound in the Carboniferous limestone of many English and Irish localities, but no well authenticated Scottish examples have hitherto come under my observation. Martin mentions Bakewell and Buxton, in Derbyshire. It is very common about Clitheroe and Bolland, in Lancashire, and at Park Hill, Longnor, Derbyshire; at Settle and Malham Moor, in Yorkshire; in the Isle of Man, &c. In Ireland, Mr. Kelly mentions Mullaghfin, Millecent, more

Product details

  • Paperback | 192 pages
  • 189 x 246 x 10mm | 354g
  • United States
  • English
  • black & white illustrations
  • 1236909895
  • 9781236909893