. Zoology : for students and general readers . Zoology. Fig. 78.—The common Sea-urchin, Echinvs (Strongyiocentrotue) drSbachlemis. d, frame-work of mouth and teeth seen in front; c, the same seen sideways; a, d, side and external view of a single tooth (pyramid); ail natural size.—After Morse. States, Northern Europe, and the Arctic Seas. It is com- mon among rocks, ranging from low-water mark to fifty or more fathoms. It eats sea-weeds, and is also a scavenger, feeding on dead fish, etc. We have observed great num- bers of them assembled in large groups, feeding on fish offal, a few fathoms b
. Zoology : for students and general readers . Zoology. Fig. 78.—The common Sea-urchin, Echinvs (Strongyiocentrotue) drSbachlemis. d, frame-work of mouth and teeth seen in front; c, the same seen sideways; a, d, side and external view of a single tooth (pyramid); ail natural size.—After Morse. States, Northern Europe, and the Arctic Seas. It is com- mon among rocks, ranging from low-water mark to fifty or more fathoms. It eats sea-weeds, and is also a scavenger, feeding on dead fish, etc. We have observed great num- bers of them assembled in large groups, feeding on fish offal, a few fathoms below the sur- face, in a harbor on the coast of Labrador, where fishing- vessels were anchored. On placing an Echinus in sea-water the movements of the animal, especially its mode of drawing itself along by its numerous long tenta- cles or ambulacral feet, and how it covers itself by draw- ing together bits of sea- weed and gravel, may be observed. A habit less easily detected is that of some sea-urchins burrowing in limestone rocks and coral reefs until the ani- mal sinks quite far down. How the rock becomes thus worn away, unless simply by the rotary movements of the body, is not clearly Fig. T9.—Tooth-apparatuB of the Soa- nrchm, showing the complicated arrange- ment of the muscles.—From 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
