. Bulletin - United States National Museum. Science. MONOGRAPH OF THE EXISTING CRINOIDS. 131 derived from the same stock, though along racUcally different lines. Practically the entire body of the crab is compressed within the enormously enlarged and ngicl cephalothorax, which is commonly broader than long. Locomotion, instead of beinc^ chiefly or entirely in the direction of the longitudinal axis of the body as in other bilaterally symmetrical animals, is in any direction, but most commonly at. „!,. ETHERIDGEI FKOM TUE .\RU , SHOWING THE INNER OR INTERNAL right angles to thi
. Bulletin - United States National Museum. Science. MONOGRAPH OF THE EXISTING CRINOIDS. 131 derived from the same stock, though along racUcally different lines. Practically the entire body of the crab is compressed within the enormously enlarged and ngicl cephalothorax, which is commonly broader than long. Locomotion, instead of beinc^ chiefly or entirely in the direction of the longitudinal axis of the body as in other bilaterally symmetrical animals, is in any direction, but most commonly at. „!,. ETHERIDGEI FKOM TUE .\RU , SHOWING THE INNER OR INTERNAL right angles to this axis; roughly it may be said to be best f ^^'^P^iJ ^"^1;^^;^;^^- rion of the longer axis of the cephalothorax in any given type The number of fX developed metameres vvithin the cephalothorax is always five. Asj-mmet > ofthe antrio ambulatorv appendages or of the abdomen or of both is the rule !; In the echinodorms the entire body (except for the appendages ZZ^^l eid^ird ibin a typically heavily calcified and closely knit test. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
