MESOSiLURID^. 301 



toral girdle are imperfectly displayed. Between the 

 vertebral column and the right pectoral limb is a body 

 regarded by Gervais as probably Crustacean. 



Presented by the Paris Museum of Natural History. 



49971. Slab of shale showing the impression of the dorsal aspect of 



part of the dorsal region of the vertebral column and ribs ; 



from the Karoo system of Kimberley, Griqualand West. 



A plaster cast in relief has been taken from this specimen. 



Presented by M. Marcus, Esq., 1878. 



49972. Fragment of shale showing the impression of the ventral 



aspect of part of the dorsal region of the vertebral column 

 and ribs ; from Kimberley. A plaster cast exhibits the 

 features of this specimen in relief. 



Presented by W. Benstead Smith, Esq., 1878. 



Fig. 85. 



tnl.f-J-f 



° * ! 



Mesosaurus tenuidens. — Ventral aspect of the left pectoral limb; from the 

 Karoo system of Griqualand West. { . cnl.f, entepicondylar foramen of 

 humerus ; r, radius ; it, ulna. 



49973. ►Slab of shale showing a lateral impression of the anterior 



caudal region, together with a few of tho vertebra* them- 

 selves ; from Kimberley. 



Presented by Captain J. Scott ffc!/>s, 1S7S. 



49974. Fragment of shale exhibiting the impression of the ventral 



and left lateral aspect of part of the anterior caudal region, 



