Page:EB1911 - Volume 20.djvu/633

PALAEONTOLOGY

Plate I.

Fig. 1.—An ichthyosaur (I. quadriscissus) containing in the body cavity the partially preserved skeletons of seven young, proving that the young of the animal developed within the maternal body and were brought forth alive; i.e. that the ichthyosaur was a viviparous animal. (Specimen presented to the American Museum of Natural History by the Royal Museum of Stuttgart through Professor Eberhard Fraas.)
Fig. 2.—A hypothetical pictorial restoration of the mother ichthyosaur accompanied by five of its newly born young, from the information furnished by actual fossils. (From a drawing by Charles R. Knight made under the direction of Professor Osborn.)
Fig. 3.—One of the most perfect of the many specimens discovered and prepared by Herr Bernard Hauff, and showing the extraordinary preservation of the epidermis of the ichthyosaur, which gives the complete contour of the body in silhouette, the outlines of the paddles, of the remarkably fish-like tail, into the lower lobe of which the vertebral column extends, and the great integumentary dorsal fin.

Materials for the Restoration of Ichthyosaurs.—This plate illustrates the exceptional opportunity afforded the palaeontologist through the remarkably preserved remains of Ichthyosaurs in the quarries of Holzmaden near Stuttgart, Württemberg, excavated for many years by Herr Bernard Hauff. (Illustrations reproduced by permission from specimens in the American Museum of Natural History, New York.)

XX. 580.