. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. CHARACTERISTIC DEEP-SEA -WOKMS. 55 Fig-. 268. Rhamphobra- Of the families here enumerated, none has so important a bearing on the character of the faunal region as that of the Eimicidae. Their representatives are found in far the greatest number of localities ; they range f
. A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880. Blake (Steamer); Marine animals -- Atlantic Ocean; Marine sediments. CHARACTERISTIC DEEP-SEA -WOKMS. 55 Fig-. 268. Rhamphobra- Of the families here enumerated, none has so important a bearing on the character of the faunal region as that of the Eimicidae. Their representatives are found in far the greatest number of localities ; they range from the littoral district to the lowest depths at which chsetopods have been dredged by the " ; They are represented by the largest number of genera (Diopatra, Onuphis, Eunice, Rhamphobrachiuni (Fig. 268), Marphysa, Lisidice, Lumbriconereis, Arabella), and, judging from the large number of their tubes met with in many localities, they must form an essential part of the fauna. It is easily seen, however, that the va- rious genera of this family show differences in their ver- Agas- tical range, the bearing of which will perhaps be more clearly understood when the conditions of temperature of their habitat are taken into account in connection with it. Thus the Eunice conglomerans, judging from the abundance of its paper-like irregular tubes (Fig. 269), is a characteristic in- habitant of the littoral belt, as far as 100 fathoms. From deeper waters come the tubes of the Eunice tibiana Pourt. ; they descend to 243 fathoms, about to the re- gion where the Eunicidea of the species Diopatra and Onuphis appear, some of which frequently build very peculiar tubes; such as the flat, parchment-like tubes with cemented sponge spicules of Diopatra Pourtalesii, and others mentioned by Pourtales in his preliminary account of the results of his first expedition. Among these chsetopods species now appear which perhaps belong exclusively to the deep sea; they are separated from Dio
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Keywords: ., bookauthoruscoasta, bookcentury1800, bookdecade1880, bookyear1888
