46 GEOKMYDA DEPRESSA. 



ginal plates twelve on each side. There are seven verte- 

 bral plates ; the fifth and sixth smallest and regularly tra- 

 pezoidal , broader than long. The areola of each of the 

 costal plates has a distinct brown spot; of the vertebral 

 plates the four anterior ones have each a pair of similar 

 brown spots just before the posterior border of the scale , 

 one on each side of the vertebral ridge. 



Paralel longitudinal yellow lines on the neck; a much 

 broader longitudinal yellow patch commences above the 

 eye and runs along the margin of the upper surface of 

 the head. The front margin of the gular plates more or 

 less denticulated having three prominences on each side. 

 Length of the carapace over the curve T^/g cm. 



Habit. Borneo. 



The four specimens of this species , which Giebel recei- 

 ved from Banka, were all characterized by one or more 

 supernumerary vertebral shields , but some of them were 

 remarkably assymetrical. Our specimen is very symme- 

 trically built and best corresponds with Giebel's upper figure , 

 only the caudal plates are less prominent and more corres- 

 pondent in shape with the adjacent marginals. 



Geoetnytlu spinostt. 



One adult stuffed specimen from Poeloe Tello on the 

 Baton islands, W. of Sumatra; another adult in spirits 

 from W. Sumatra. 



Geoetnifdn depressa. 



This species which was first described by Anderson from 

 Arracan (Ann. & Mag. of Nat. Hist. 1875; vol. XVI. 

 p. 384j appears to inhabit Sumatra as well. So at least 

 would I conclude from an adult stuffed example preser- 

 ved in the Leyden Museum which , as far as Anderson's 

 diagnosis goes , appears to be identical with his species. 

 The second, third and fourth vertebral offer a nearly flat 

 surface, each of them being about twice as broad as long. 

 The length of the shell over the curve is 22.5 cm. The 

 claws are stronger than in G. spinosa. 



r^otes from ttie Ueyden IMu&eum, "Vol. III. 



