Three Cruises of the United States Coast and Geodetic Survey Steamer " Blake"

Three Cruises of the United States Coast and Geodetic Survey Steamer " Blake"

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 edition. Excerpt: the same time afforded a glimpse into the countless ages of the past, when these crinoids, so rarely seen nowadays, formed a prominent feature of the animal kingdom. I could see, without great effort of the imagination, the shoal of Lockport, teeming with the many genera of crinoids which the geologists of New York have rescued from that prolific silurian deposit, or recall the formation of my native country, in the hillsides of which, also among fossils indicating shoal-water beds, other crinoids abound, resembling still more closely those we find in these waters." The English, French, and Norwegian expeditions discovered also other stalked crinoids belonging to the genera Bathycrinus, was not fortunate Hyocrinus, and Uycrinus; but the " Blake enough to obtain any of these. The last and perhaps most interesting of the West Indian stalked crinoids belongs to the genus Holopus. (Figs. 413, 414.) Less than half a dozen specimens of it are known to exist. The first specimen collected is now in the museum of the Ecole des Mines. Sir Rawson W. Rawson, when Governor of Barbados, obtained three specimens, which were lent to Sir Wyville Thomson, and have, with the material of the "Blake," formed the basis of Dr. Carpenter's work on the subject. The genus Holopus was established by D'Orbigny, in 1837, from a single specimen which was brought from Martinique by Sander Rang. Its true nature was not recognized by other palaeontologists, some of whom considered it to be a barnacle. The dried specimens all have a blackish green tinge; the single arm dredged off Montserrat had a whitish tint. The arms of all the specimens are strongly curved, closing the disk entirely; but of course this is not the natural attitude of the animal. more

Product details

  • Paperback | 66 pages
  • 189 x 246 x 4mm | 136g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236636864
  • 9781236636867