. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 254 Mr. C. W. Andrews on the Structure existed, since in some specimens the upper angle is well preserved, and shows that it united in a suture with the adjoining element. Fi'nn-e showing- the relations of the transpalatine to the surrounding- buues. The anterior edge of the postorbital formed the hinder margin of the orbit, and the posterior a part of tlie anterior border of the temporal fossa. Its lower edge, as already stated, joins the upper edge of the jugal, while
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 254 Mr. C. W. Andrews on the Structure existed, since in some specimens the upper angle is well preserved, and shows that it united in a suture with the adjoining element. Fi'nn-e showing- the relations of the transpalatine to the surrounding- buues. The anterior edge of the postorbital formed the hinder margin of the orbit, and the posterior a part of tlie anterior border of the temporal fossa. Its lower edge, as already stated, joins the upper edge of the jugal, while its posterior angle is truncated by a short suture with the anterior ramus of the squamosal. The relations of the postorbital, jugal, and maxilla to one another and to the squamosal are almost precisely the same as those found by Sollas in a skull of Plesiosaurus Conyheari (see Quart, Journ. Geol. Soc. vol. xxxvii. 1881, p. 444, pi. xxiv. fig. 1) ; moreover, they bear out Huxley's statement that the postfrontal ( = postorbital) articulates with a bone that is the homologue of the squamosal of tiie crocodile. "Williston, on the other hand, states that in CimoUosaurus there is no trace of the T-shaped suture between the jugal, postorbital, and squamosal, and that if it existed the squa- mosal would necessarily articulate with the maxilla. This is not the case in skulls of Peloneustes^ in which the posterior end of the maxilla approaches the squamosal, but remains separated from it by the jugal. Cope, in his paper on the same skull of CimoUosaurus, describes an arrangement of bones in the temporal arch which differs widely from that found in Peloneustes and also in Plesiosaurus. He figures the suture between the jugal and squamosal as lying far back near the hinder end of the temporal arcade, so that the postorbital unites with the jugal only, and is widely. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabil
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