Archive image from page 528 of The depths of the sea. The depths of the sea. An account of the general results of the dredging cruises of SS. Porcupine and Lightning during the summers of 1868, 1869 and 1870, under the scientific direction of Dr. Carpenter, , J. Gwyn Jeffreys, , and Dr. Wyville Thomson, depthsofseaaccou00tho Year: 1873 WE DEEP-SEA FAUNA. 455 representatives of this group, until now supposed to be on the verge of extinction, and that all the known species are from depths beyond the limit of ordinary dredging, we are led to anticipate that crinoids may pr
Archive image from page 528 of The depths of the sea. The depths of the sea. An account of the general results of the dredging cruises of SS. Porcupine and Lightning during the summers of 1868, 1869 and 1870, under the scientific direction of Dr. Carpenter, , J. Gwyn Jeffreys, , and Dr. Wyville Thomson, depthsofseaaccou00tho Year: 1873 WE DEEP-SEA FAUNA. 455 representatives of this group, until now supposed to be on the verge of extinction, and that all the known species are from depths beyond the limit of ordinary dredging, we are led to anticipate that crinoids may probably form rather an important element in the abyssal fauna. Fig. 74.—Archastei bifrons, Thomson. Oral aspect. Three-fourths the natural size (No. 57, 1S69.) The general distribution of the deep sea Asteridea has already been referred to. Perhaps the most obvious peculiarity which they present is the great preponderance of the genera Astrogonium, Archaster, Astropecten, and their allies. Genera belonging to other groups do not apparently become less
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