ARCHEGOSAUEID^l. 187 



** Gaudrya latistoma, Fritsch 1 . 



The type. Apparently of the size of Chelyosaurus vranyi. 

 Hah. Europe (Bohemia). 



R. 1470. Cast of a fragment of shale showing the palatal aspect of 

 the anterior extremity of the cranium and a portion of 

 the mandible. The original, which is the type, was 

 obtained from the Gaskohle (Lowest Permian) of Nyfan, 

 Bohemia, and is figured by Fritsch in his ' Fauna der 

 Gaskohle,' vol. ii. pi. lxi. fig. 1. Purchased, 1888. 



Genus CHELYOSAURUS, Fritsch 2 . 

 Syn. Chelyderpeton, Fritsch 3 . 



Skull somewhat larger and narrower than in Cochleosaurus, but 

 without posterior processes to the supraoccipitals ; a single squa- 

 mosal on either side, distinct epiotic cornua, nares probably very 

 minute, anterior border of the orbit formed by the prefrontal . and 

 postorbital, and outer border by the postorbital. The occipital con- 

 dyles appear to have been unossified ; the vertebrae are more ossified 

 than in Arcliegosaurus, having a basal element to the centra (hypo- 

 centrum pleurale) ; the intercentra are relatively very large ; and 

 the tarsus is well ossified. 



Chelyosaurus vranyi, Fritsch 4 . 



Syn. Chelyderpeton vranii, Fritsch 5 . 



The type and only described species. Skull about one third 

 longer than broad, its extreme length being 0,170 (6'7 inches). 

 Hah. Europe (Bohemia). 



R. 1456. Cast of a slab showing the ventral scutes, the pelvis and 

 part of the caudal region, and one pelvic limb. The 

 original, which is the type, was obtained from the Eoth- 

 liegendes (Lower Permian) of Oelberg, and is figured by 

 Fritsch in the ' Sitzungsber. k. bohm. Ges. Wiss.' for 1877, 

 p. 207, and also in his ' Fauna der Gaskohle,' vol. ii. pi. liv. 



Purchased, 1888. 



1 Fauna der Gaskohle, vol. ii. pt. i. p. 31 (1885). 



2 Sitz. k. bohm. Ges. Wiss. for 1877, p. 208 (1878).— Amended from 

 Chelydosaurus. 



3 Jahresb. k. bohm. Ges. Wiss. 1877, pp. xx, xxi. 



4 Sitz. k. bohm. Ges. Wiss. for 1877, p. 208 (1878). 



5 Jahresb. k. bohm. Ges. Wiss. 1877, pp. xx, xxi. 



