. Narrative of a voyage to the Polar Sea during 1875-6 in ships ' Alert' and 'Discovery' [microform]. Alert (Ship); Discovery (Ship); Alerte (Navire); Discovery (Navire); Natural history; Sciences naturelles. l'^'*V,l i,Jf(! 280 APPENDIX. No. IX. i^y 'ii i« m ';.i i 'â â ' 'i! ' / i â â ^^- 'Mi-. reduplication of certain papillae in the vertical axis of the Ophiuran. This seems to arise from the longitudinal cleavage of pre-existing papilla3. In young individuals the spinelets of the disk are pro- portionally long, five or six times their own diameter, and present all the appearances of
. Narrative of a voyage to the Polar Sea during 1875-6 in ships ' Alert' and 'Discovery' [microform]. Alert (Ship); Discovery (Ship); Alerte (Navire); Discovery (Navire); Natural history; Sciences naturelles. l'^'*V,l i,Jf(! 280 APPENDIX. No. IX. i^y 'ii i« m ';.i i 'â â ' 'i! ' / i â â ^^- 'Mi-. reduplication of certain papillae in the vertical axis of the Ophiuran. This seems to arise from the longitudinal cleavage of pre-existing papilla3. In young individuals the spinelets of the disk are pro- portionally long, five or six times their own diameter, and present all the appearances of ordinary embryonic spines. During the process of growth, however, increase is made in thickness only, so that when maturity is attained, and the spinelets, along with the disk, are invested with the semi- transparent leathery membrane of the body, the appearance is more that of short stumpy prominences than of actual spinesâa deception which at lirst sight gives a totally diflferent character to the Ophiurans. Astrophyton arcticum (Leach), ^cZe Smith. This Astrophyton was dredged off West Greenland by Mr. A. C. Horner, who accompanied Sir Allen Young in the * Pandora,' at a depth of 600 fms. in Smith's Sound, lat. 78° 19' N., long. 74° 30' W. The present writers have not seen this specimen, and are indebted for the information to Mr. Edgar A. Smith, , of the British Museum, by whom it has been determined and referred to Leach's species. This is particularly interesting, as the original Gorgonoce- phaliis arcticus. Leach, was obtained by Sir John Koss in Baffin's Bay, lat. 73° 37' N., long. 77° 25' \V., at a depth of 800 fms. This was one of the earliest instances of a livinjr organism being dredged from so great a depth. Crinoibea. Antedon Eschriehtn (Miiller) and Antedon celtica (Barrett). Coll. F'eilden : Discovery Biiy, 25 fms., bottom hard. The ComatidcB were handed over to Dr. Carpenter for determination ; and he has kindly informed us of the occur
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Keywords: ., bookcentury1800, bookdecade1870, books, booksubjectnaturalhistory
