DESCEIPTION OF PLATE XXX. 



COLOSSOCHELTS AtLAS. 



The figures in this Plate have been drawn by Mr. Dinkel 

 from the original specimens in the British Museum. 



Fig. 1. The bifid episterniim of Colossochehjs Atlas, seen from the 

 under surface, showing the thick cuneiform keel. The specimen 

 has been drawn one-sixth of the natural size, and bears the 

 number 40,630 in the British Museum Catalogue. (See pages 

 363, 374, & 378.) 



Fig. 2. Shows the xyphosternal or posterior portion of the plastron 

 of Colossochehjs Atlas, one-sixth of the natural size. The pos- 

 terior cleft is well seen. The specimen is numbered 40,629 in 

 the British Museum Catalogue. (See pages 363 & 378.) 



Figs. 3, 4, and 5. Represent three different views of one of the ungual 

 bones of Colossochelys Atlas, drawn one-half of the natural size. 

 Brit. Mus. Cat. No. 36,731. (See pages 364, 374 & 381.) 



