Bulletin Volume 100, V. 5

Bulletin Volume 100, V. 5

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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. 1922 edition. Excerpt: ...the second (fig. 2d). On the convex border and toward the tip are a few unequal and irregular asperities. This form of hook recalls that which I have described in O. expedita, and which we find again in O. propinqua and O. puncto-limbata; it is very different from that which we know in the majority of the species of Ophiothrix, and which occurs in O. hirsuta. It is to be noticed also that the difference between this hook and the second ventral spines is not very great In figure 2c I show the first ventral spine at a short distance from the disk, where it has not yet acquired the definitive form of a hook provided with regular points. The tentacle scale (6) is oval and terminated by a long point. Ophiothrix longipeda has been met with in a large number of localities in the Indo-Pacific region. I have continued to consider as different species O. galatheae, O. hirsuta, and O. longipeda, and in fact the specimens included in the Albatross collection can be perfectly well and easily assigned to one or the other, their characters being well marked. It is not worth while to review their characters here, nor those of O. puncto-limbata which I enumerated and discussed in 1905 ('05, pp. 94, 95). But I have thought that it might be useful to include some photographs which will facilitate the determination of these forms. To the species brought back by the Albatross I have added (pl. 32, fig. 6) a photograph of the dorsal surface of an O. puncto-limbata; the specimen came from Amboina and was given me by Professor de Loriol; it is one of those which he described in his memoir of 1893 (p. 416). I have added to the photographs showing the dorsal surfaces of the arms of various species of Ophiothrix (pl. 33) one of an O. obtusa, the upper arm plates of...show more

Product details

  • Paperback | 216 pages
  • 189 x 246 x 12mm | 395g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236854284
  • 9781236854285