294 SAUROPTERYGIA. 



The following specimens would agree, in respect of size, with the skull 

 of the present form, but some of them may be referable to Simo- 

 saurus, while if Nothosaurus aduncidens be a distinct species, 

 they might equally ivell belong to that form. 



1103. The centrum of a "pectoral" vertebra; from the Muschel- 

 kalk of Seineck, near Baireuth, Bavaria. The dimensions 

 are :— length 0,043(1 -68 inches), width 0,058(2-28 inches), 

 height 0,056 (2-2 inches). The lower costal facet, although 

 somewhat obscure, is seen on the centrum, but closely 

 approximated to the n euro-central suture. 



Purchased. About 1836. 



42832. A late dorsal vertebra, wanting the neural spine ; from the 

 Muschelkalk, probably of Wiirtemberg. This specimen 

 would agree approximately in relative size with the pre- 

 ceding, and also with the earlier dorsal centrum figured 

 by Meyer in the ' Saurier des Muschelkalk,' pi. xxiv. 

 figs. 8, 9, under the present specific name. The dimen- 

 sions of the centrum are : — length 0,047 (1*45 inches), 

 width 0,052 (2-05 inches), height 0,053 (2-08 inches), 

 and the diameter across the transverse processes 0,094 

 (3-7 inches). On the left side the vertically elongated 

 articular face of the transverse process shows traces of a 

 division into two portions. 



Van Breda Collection. Purchased, 1871 . 



1092. The arch of a rather smaller dorsal vertebra; from Baireuth. 

 The diameter across the transverse processes is 0,077 

 (3*05 inches). This specimen should perhaps be referred 

 to the smaller N. adriani, Meyer, or to Simosaurus. 



Purchased. About 1836. 



38706. The crushed neural arch of a very large dorsal vertebra ; 

 from the Lettenkohle * of the Lower Keuper of Hoheneck, 

 near Ludwigsburg, north of Stuttgart, Wiirtemberg. The 

 transverse diameter across the costal articulations is 0,119 

 (4- 7 inches), but this is considerably exaggerated by pres- 

 sure. Purchased, 1864. 



R. 309. One longitudinal half of the centrum of a dorsal vertebra, 

 agreeing approximately in size with No. 42832; from 

 the Muschelkalk of Breslau. The inner surface has been 

 polished. By exchange, 1883. 



1 See note 6, p. 285. 



