BY E. P. RAMSAY, F.R.S.E. 161 



13-6 inches'; over the back 18 inches; plastron in length 14 -5 inches ; 

 breadth 11-5 inches ; head and neck about 7 inches, from nostril 

 to eye 1*7, from nostril to posterior margin of occipital Bhield 

 3-4 inches ; wrist and hand to tip of third finger, 6 inches ; width 

 2*5 inches; hind fin from plastron 8 inches; width 3 inches; tail 

 from plastron 4 inches ; free portion of marginal plate over the 

 tail 2 7 inches. 



Marginals 10 +10-1-1 21 



Costals 8 + 8 M 16 



Pygall , l 



Nuchal 1 1 



Vertebral or neural; traceable from without 6 onlv 



Plastron or ventral shield 9 distinct plates. 



Episternal 1+ 1 , 2 



Interclavicle 1 1 



Hyposternals 1 + 1 2 



Hyosternals 1 + 1 2 



Xiphisternal 1 + 1 2 



The two triangular plates at the side, shown in pi. III., are 

 probably only the curved-in portions of the adjacent marginals, and 

 have been cut away in the present specimen. 



Remarks. — I had provisionally placed this species near the 

 genus Cyclanosteus, as it appeared to me to be allied to that genus 

 and to Emyda, but finding that it differed so considerably from 

 both, I have been obliged to create a new genus Carretochelys for 

 its reception. If the ossified portions of the genus Emyda (Gray), 

 were anchylosed and the posterior flap absorbed, the plastron 

 would be almost identical with the present species. There is 

 nothing in Gray's Catalogue or Supplement that comes nearer to it 

 than these genera, but it appears to me to be a link between the 

 river tortoises and the sea turtles. 



The eggs with this specimen prove it to be a female ; they are 

 white, hard-shelled, and almost quite round, 1*55 x 15 inches in 

 diameter. 



11 



