Proceedings of the Royal Physical Society of Edinburgh Volume 10-11

Proceedings of the Royal Physical Society of Edinburgh Volume 10-11

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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. 1891 edition. Excerpt: are of essential service in its identification. The attempt has also been made to give a brief diagnosis of each species, such as will enable the collector to identify it on the spot; but these notes will not stand in the place of more complete descriptions, still less can they be appealed to as decisive in critical cases, when one of the first authorities upon the group writes as follows: --" It seems almost hopeless to attempt to distinguish the species of Eckinus known as E'. elegam, E. norvegicus, E. male, and E. Flemingii." 1 It will be obvious that a short differential diagnosis can only be regarded as of provisional value, and specimens will often have to be reserved for leisurely discrimination. Still it is believed that the characters here given will prove satisfactory in the majority of cases, so long as only British forms are taken into consideration.. With regard to distribution, I have given the British localities pretty fully, with the names of the authors who are responsible for them. The exact references may be obtained from the bibliography. The British area has been accepted as defined by Dr Norman'' in his recent paper on that subject. It thus includes most of the deep water investigated by H.M.S. " Porcupine " and other vessels, as well as the Channel Islands, though I am quite disposed to agree with those who maintain that from a zoo-geographical standpoint they belong rather to France than to England. The extra-British range of each form is indicated generally, and in giving this I have relied mainly upon the following authors: --Coast of the United States, Verrill; Greenland and Denmark, Liitken; Norway and Sweden, Sars and Diiben and Koren; France, Cailliaud and Fischer; more

Product details

  • Paperback | 256 pages
  • 189 x 246 x 14mm | 463g
  • United States
  • English
  • black & white illustrations
  • 1236895770
  • 9781236895776