. 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 1800. Blake (Ship); Marine animals -- Atlantic Ocean; Marine sediments; Ocean. CHARACTERISTIC DEEP-SEA TYPES. CORALS. 149 Two species of the genus Tlieeocyathus have been dredged, and are not uncommon in from 100 to 315 fathoms. One of these, 2\ ci/lhidraceuSy is here figured. (Fig. 464.) The genus is inter- esting as dating back to the lias; it is not kno
. 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 1800. Blake (Ship); Marine animals -- Atlantic Ocean; Marine sediments; Ocean. CHARACTERISTIC DEEP-SEA TYPES. CORALS. 149 Two species of the genus Tlieeocyathus have been dredged, and are not uncommon in from 100 to 315 fathoms. One of these, 2\ ci/lhidraceuSy is here figured. (Fig. 464.) The genus is inter- esting as dating back to the lias; it is not known from any of the formations inter- mediate between the Has and our epoch. The recent forms present, therefore, a com- paratively rare instance of the reappearance of a genus apparently extinct through a con- siderable succession of ages. Deltocyathus italicus (Figs. 465, 465 a-d) is an exceedingly. Fig-. 404.^ ,; , .- thus cj-lintlraceus. \. (Pourtales.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agassiz, Alexander, 1835-1910; U. S. Coast and Geodetic Survey. Boston Houghton, Mifflin
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectocean, bookyear1888
