CYCLEMYS. 31 



loped in adult specimens ; a small inguinal shield may be present ; 

 the suture between the pectoral shield and the marginals shorter 

 than that between the abdominal and the marginals ; the longest 

 median suture is that between the pectorals. Hook of upper jaw 

 bicuspid. Digits distinctly webbed, with sharp claws. Front part 

 of arm with broad transverse scales. Carapace brown, or yellowish 

 brown spotted with dark brown ; plastron yellowish or pale 

 brown in the young, with dark brown spots or radiating lines ; in 

 the adult, dark brown. Neck with dark and light longitudinal 

 lines. 



Length of shell 7| inches. 



Hob. Malay Archipelago and Peninsula, Cainboja, Siam, Burma 

 (Pegu, Tenasserim). 



28. Cyclemys mouhoti. 



Cyclemys mouhotii, Gray, A. M. N. H. (3) x, 18G2, p. 157 ; 



Bouleng. Cat. Chel. #c. p. 132. 

 Pyxidea mouhotii, Giinth. Rept. B. I. p. 16, pi. iv, 6g. D ; Theob. 



Cat. p. 9. 



Carapace depressed, angular, the vertebral region flat, with three 

 strong parallel keels ; posterior margin serrated ; vertebral shields 

 much broader than long and as broad as the costals ; first vertebral 

 as long as broad or broader than long, narrower than second. 

 Plastron a little narrower than the opening of the shell, hind lobe 

 angularly emarginate; bridge broad and very short, its width 

 about one third the length of the plastron ; the hypoplastral bone 

 and the abdominal shield have a much greater share in the forma- 

 tion of the bridge than the hyoplastral and pectoral ; the longest 

 median suture is that between the abdominals. Hook of the upper 

 jaw strong, entire. Digits nearly free ; limbs covered with large 

 scales. Carapace yellowish or reddish brown ; plastron yellowish, 

 with or without a few large dark-brown spots ; neck of young 

 brown, spotted with yellow. 



Length of shell 6| inches. 



Hob. Cachar, Siam, Cochin China. 



29. Cyclemys amboinensis. 



Testudo aiuboiuensis, Daud. Kept, ii, p. 309. 



Cistudo amboinensis, Gray, III. Ind. Zool. i, pi. Ixxvii, figs. 3, 4. 



Cuora amboinensis, Gray, Cat. Sh. Rept. i, p. 41 ; Giinth. Rept. B. 1. 



p. 12, pi. iv, figs. A, B ; Theob. Cat. p. 7. 

 Cyclemys amboinensis, Bouleng. Cat. Chel. fyc. p. 133. 



Carapace depressed and tricarinate in the young, usually very 

 convex and without or with a single keel in adult females ; verte- 

 bral shields as long as broad or a little longer than broad in the 

 adult, broader in the young, much narrower than the costals. 

 Plastron as large as the opening of the shell in the adult, without 

 distinct bridge; no anal notch; the line of junction between the 



