. Zoology for high schools and colleges. Zoology. Fig. 448.—Skull of Ichthyosaurus ; lateral view. Prnx, premaxlllary bone ; Mx, maxillary ; N, nasal; Fr, frontal; Prf, prefrontal; Pof, postfrontal; Pa, parietal i, lachrymal; M, malar ; Qj, quadratojugal ; Q, quadrate ; Pob, postorbital; Sg, squamosal; D, dentary; Ang, angular ; AH, articular ; 8. Ar, subarticular ; Pter pterygoid.—After Cope. the head was very large, the neck very short, and the orbits were enormous ; the vertebrse were remarkably short and bi- ^ concave. They were carniv- orous, and powerful swim- mers, and common in tho Ju-
. Zoology for high schools and colleges. Zoology. Fig. 448.—Skull of Ichthyosaurus ; lateral view. Prnx, premaxlllary bone ; Mx, maxillary ; N, nasal; Fr, frontal; Prf, prefrontal; Pof, postfrontal; Pa, parietal i, lachrymal; M, malar ; Qj, quadratojugal ; Q, quadrate ; Pob, postorbital; Sg, squamosal; D, dentary; Ang, angular ; AH, articular ; 8. Ar, subarticular ; Pter pterygoid.—After Cope. the head was very large, the neck very short, and the orbits were enormous ; the vertebrse were remarkably short and bi- ^ concave. They were carniv- orous, and powerful swim- mers, and common in tho Ju- rassic seas of Europe; one form existed in the Jurassic times in Wyoming. Order 7. Theroniorpha.— This order is divided into the Pelycosauria and Anomo- dontia. Tho beaked Saurians were somewhat lizard-like, but Fig. 449.—Posterior view of the skull of were Synthetic tvpes, combin- Ichthyonaurus; lettering as in Fig. 443, . .'' •' ^ witti following additions ; Bo, basiocci- ing the characters 01 the ich- pital ; Exo, Bxoccipital; Sup. O, supra- ,-, ., . ^, ,, occipital; Opo, opisthotic; stap, supra- tnyosaurs, the turtles, the stapedial or hyomandibular.—After Cope. 07 7 -ii j_i £ t iSphenodoti, with those of liz- ards, Dinosaurians, and crocodiles. The skull was short, and in Dicynodon the jaws in front had the nipping, horny beak of a turtle, while from behind in the upper jaw pro- truded two long, curved, canine teeth. Dicynodon Hgriceps Owen, had a skull about half a metre (20 inches) 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, H. Holt and Company
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
