EMYS MUTICA. 25 



than, and nearly as large as, pectorals. Abdominal plates longer than either pectorals or proe- 

 anals ; prceanals longer than pectorals. The suture between the anals is longer than their 

 posterior margin. 



Head proportionate, covered with undivided skin ; upper jaw strongly denticulated, with 

 a pair of tooth-like prominences in front. Tail shorter than the head. Feet broadly webbed ; 

 forearm with transverse series of broad, short, imbricate scales. 



Colour. — Shell more or less deep brown, the plates of the lower side edged with yellow. 

 A broad yellow band runs from the nostrils over the eyebrows along the side of the neck, a 

 short yellow band anteriorly on each side of the upper jaw. Feet olive, spotted with yellow. 



Our description is taken from very old specimens, the shells of which are 14-16 inches long. 

 Another specimen, 5 inches long, has the carapace not completely ossified. The species is 

 found in the Ganges, and probably in the whole of Bengal ; according to Cantor in Pinang 

 also. The structure of its jaws shows that it is a thoroughly carnivorous and probably a 

 rather ferocious species. According to Blyth, the species would attain to 22 inches in length 

 of carapace (Journ. As. Soc. Beng. xxii. 1854, p. 643). 



Emts MUTICA. The Chusan Terrapen. 



Emys muticus, Cantor, Ann. ^ Mag. Nat. Hist. 1842, ix. p. 482. 



Form. — Shell rather depressed, with a very distinct continuous median ridge, extending 

 from the middle of the fij'st vertebral plate to the end of the last ; no costal ridge ; the 

 nuchal region is subtruncated, the caudal with a very distinct notch. Lateral margins but 

 little reverted. The sternum is equally wide between the axillary and inguinal incisions, its 

 Avidth being rather more than one-half of its length ; it is subtruncated in front and deeply 

 notched behind. 



Plates. — The areolae are distinct, situated on the posterior margins of the plates. Nuchal 

 plate of moderate size, triangular, longer than broad, broadest behind. The first vertebral 

 subpentagonal, broader than long, broader anteriorly than posteriorly ; the last with the keel 

 very distinct, and broader than the caudals ; caudals broader than long. Gulars as broad as 

 long ; postgulars as long as pectorals and as abdominals ; the sternal portion of the abdominals 

 is broader than long, and rather shorter than the prceanals ; the suture between the anals is 

 rather longer than their hind margins, which meet at a right angle. Inguinal plates 

 extremely small. 



Head proportionate ; jaws not denticulated. Tail as long as the liead. Feet broadly 

 webbed ; forearm with large, thin scales. 



Colour. — Shell uniform greenish brown above. Sternum yellow; the areolar portion of 



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