302 PROTEROSATJRIA. 



Proterosaurus speneri, Meyer \ 



The type species. Estimated to have attained a length of from 

 five to seven feet. Two vertebrae in sacrum. 

 Hah. Europe (Germany). 



R. 1242. Cast of a slab of shale, showing the middle region of the 

 skeleton and an eDtire pectoral limb. The original was 

 obtained from the Kupferschiefer (Upper Permian) of 

 Heidelberg near Schweina in Thuringia, and is preserved 

 in the Museum of the Academy of Ereiberg. It is 

 described and figured by Geinitz in ' Die Yersteinerungen 

 des deutschen Zechsteingebirges,' p. 3, pi. i. (1848), and 

 by von Meyer in his ' Eauna der Yorwelt — Saurier aus dem 

 Kupferschiefer,' p. 11, pi. ii. ; and is also noticed by Seeley 

 in the ' Phil. Trans.' 1887, p. 203, where it is provisionally 

 referred to the present species, although the suggestion 

 is made that it may prove distinct. PurcJiased, 1887. 



42760. A split slab of shale, showing part of the vertebral column of 

 the trunk ; from the Upper Permian of Thuringia. The 

 vertebrae agree very closely in size with those of the 

 skeleton figured by von Meyer, op. cit. pi. ix. 



Van Breda Collection. Purchased, 1871. 



Ordinal Position Uncertain. 



Genus ATOPOSAURUS, Meyer \ 



Body and limbs lacertiform. Vertebra? amphicoelous. Manus of 

 Ehynchocephalian type ; but only four digits in the pes, of which 

 the phalangeals number 2, 3, 4, 4. Tibia and fibula, and radius 

 and ulna respectively in close apposition ; proximal carpals elongated 

 like those of the Crocodilia. Mandibular symphysis long ; dentition 

 said to resemble that of the Geckonidw. No trace of scutes or scales. 



Atoposaurus oberndorferi, Meyer 3 . 



Of small size. Distinguished from the typical A. jourdani, Meyer, 

 by the shorter vertebral centra, the longer and more slender ischium 



1 < Palseologica,' p. 109 (1832). 



2 Neues Jahrb. 1850, p. 198. 8 Loc. cit 



