Image from page 97 of "Water reptiles of the past and present" (1914) (14773005275)

Identifier: waterreptilesofp1914will

Title: Water reptiles of the past and present

Year: 1914 (1910s)

Authors: Williston, Samuel Wendell, 1851-1918

Subjects: Aquatic reptiles

Publisher: Chicago, Ill., The University of Chicago Press

Contributing Library: Boston Public Library

Digitizing Sponsor: Boston Public Library

Text Appearing Before Image:

4WW? iffl Fig. 38.—Paddles of Plesiosaurs: A, right hind paddle of Thaumatosaurus, afterFraas; B, right hind paddle of Trinacromerum; C, right front paddle of same indi-vidual; /, femur; fb, fibula; t, tibia; h, humerus; r, radius; u, ulna. joint than in the other reptiles, showing possibility of considerablerotation on the long axis, and an antero-posterior propelling action.The paddles were certainly more powerful than those of any otheraquatic air-breathing animals. There were no additional digits,all plesiosaurs having neither more nor less than five in each handand foot. Hyperphalangy was sometimes carried to an excessive 86 WATER REPTILES OF THE PAST AND PRESENT degree, some digits of some species having as many as twenty-fourbones, a larger number than has been observed in any other air-breathing vertebrate.

Text Appearing After Image:

Fig. 39.—Pectoral girdle (in part) andfront paddles of Elasmosauriis (after Riggs):sc, scapula; h, humerus; cor, coracoid; r,radius; u, ulna. m Bw

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1914

Image from page 97 of "Water reptiles of the past and present" (1914)

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