XOIHOSAUKJDJE. 289 



42829. The nearly entire cranium, wanting the crowns of most of 

 {Fig.) the teeth ; from the Muschelkalk, probably of Baireuth, 

 Bavaria. This specimen, of which the palatal aspect is 

 shown in the accompanying woodcut, closely resembles the 

 slightly smaller example figured by Meyer in his ' Saurier 

 des Muschelkalk,' pis. ii., iii. In the restoration of the 

 palate given in pi. i. of that work, the pterygoids are re- 

 presented as extending forwards to unite with the pre- 

 maxillae, but the present specimen shows most distinctly 

 that the vomers intervene and form the median bar 

 dividing the apertures of the posterior nares. The lateral 

 borders of the channel of bone overlying the basicranial 

 axis are clearly formed by alae of the pterygoids, after the 

 manner of the Chelonian Podocnemis : but it seems from 

 the presence of a median suture shown in several of 

 Meyer's figures, and of which there appear to be traces in 

 the present specimen, that these alae united mesially as far 

 back as the occipital condyle. In Podocnemis, where the 

 occipital condyle is situated posteriorly to the articular 

 surface of the quadrate, these bones diverge posteriorly 

 to expose the basioccipital and basi- and presphenoid. The 

 ridge of bone marked b in the figure clearly corresponds 

 to the vertical ridge of the pterygoids in Podocnemis, 

 which articulates with the quadrate; this representing 

 the entire posterior portion of the pterygoids of Lizards. 

 The entire absence of infraorbital foramina on the sides of 

 the palate is well shown. 



Van Breda Collection. Purchased, 1871. 



38633. Portions of the two rami of a mandible in matrix, probably 

 belonging to this speices ; from the Lettenkohle of the 

 Lower Keuper 1 of Hohcneck, near Ludwigsburg, north of 

 Stuttgart, \Yiirtemberg. This specimen is broken off an- 

 teriorly at the commencement of the symphysis, the last 

 of the large symphysial teeth still remaining ; posteriorly 

 the greater portion of the dentary is preserved. This 

 specimen agrees closely with the nearly entire anterior 

 portion of the mandible from the Muschelkalk figured 

 by Meyer, op. tit, pi. xiii. Purchased, L864. 



1 See note 6 on p, -So. 



PARI II. 



