GEOEMYDA. 25 



21. Geoemyda spinosa. 



Emys spinosa, Gray, Syn. Kept. p. 20 ; id. III. 2nd. Zool. i, pi. Ixxvii, 



figs. 1,2. 

 Geoemyda spinosa, Gray, P. Z. 8. 1834, p. 100 ; id. 111. Ind. Zool. ii, 



pi. Ivii, fig. 2 ; Gilnth. Rept. B. 1. p. 18 ; Theob. Cat. p. 5 ; Bouleng. 



Cat. CM. Sfc. p. 137. 



Carapace of adult much depressed, with broad flat vertebral 

 region and an uninterrupted obtuse keel ; anterior and posterior 

 margins serrated ; carapace of young more regularly arched, with a 

 short keel or spinose tubercle on each costal shield, and the border 

 strongly serrated all round, each marginal being produced in a spine, 

 with or without smaller denticulation on each side ; the vertebral 

 keel stronger than in the adult. Vertebral shields (2-4) much 

 broader than long, at least as broad as the costals ; nuchal shield 

 longer than broad. Plastron large ; the width of the bridge about 

 equals the length of the posterior lobe, which is angularly emar- 

 ginate ; as regards size, the plastral shields take the following order 

 commencing with the largest: abdominals, pectorals, fern orals, 

 humerals, anals, gulars ; the suture between the abdominals not or 

 but slightly longer than that between the pectorals ; axillary and 

 inguinal shields present. Upper jaw bicuspid. Carapace brown 

 above, reddish in the young, the vertebral keel lighter ; each plas- 

 tral shield with yellow and dark-brown radiating streaks ; soft 

 parts dark brown, with a yellowish spot on each side of the neck, 

 near the ear. 



Length of carapace 8 inches. 



Hob. Teuasserim, Malay Peninsula, Sumatra, Borneo. 



22. Geoemyda grandis. 



Geoemyda grandis, Gray, A. M. N. H. (3) vi. 1860, p. 218; Gimth. 

 Rept. B. I. p. 19, pis. i & ii, figs. A & B ; TJieob. Cat. p. 5 ; 

 Bouleng. Cat. Chel. fyc. p. 138. 



Carapace arched or tectiform, not flattened on the vertebral 

 region, which bears a strong but obtuse keel ; only the posterior 

 margin serrated. Vertebral shields (1-3) not or but slightly 

 broader than long and narrower than the costals ; nuchal longer 

 than broad. Plastron similar to that of G. spinosa ; the length of 

 the suture between the pectoral shields at least two thirds that of 

 the abdominals. Dark brown or blackish above ; plastron and 

 lower surface of marginals with black and yellow rays, either the 

 black or the yellow predominating. 



Length of carapace 16 inches. 



Hob. Pegu, Tenasserim, Siam. 



23. Geoemyda depressa. 



Geoemyda depressa, Anders. A. M. N. H. (4) xvi, 1875, p. 284 ; id. 



An. Zool. Res. Yunnan, p. 721, pis. Iv, Ivi, & Ixxv B, figs. 1-5; 



Bouleng. Cat. CM. $c. p. 139. 

 Geoemyda arakana, Theob. Cat. p. vii. 



