1. TIUONYX. 257 



metrical black spots or bands ; )"oung usually with a pair of black 

 spots in front of the tail, and a black band on the liindcr side of 

 the thighs. 



Length of dorsal disk 20 ccntira. 



China and Jai)an. 



R. Swinhoe, Esq. [C.]. 

 R. Swinhoe, E.sq. [C.]. 

 (Type of Landcmania irrorata.) 



Mr. Tratt [C.]. 



Dr. Cantor. (Typos nf T. 

 tnbovuidhis and T. peroccllatn.i.) 

 St. Petersburg Mu.seum [E.]. 

 R. Swinhoe, J':sq. [C.]. 



Dr. P). Secman [C.]. Ilaslar 

 Collection. 



10. Trionyx swinhonis. 



Oscaria swinhoei, Grai/, Ann. Sf Mag. N. II. (4) xii. p. 157, pi. v. 



(1873). 

 Yuen leprosus, Ileude, Mem. Hist. Nat. Emp. Chin. i. p. 20 (1880). 



maculatus, Ileude, I. c. p. 22, pi. i. 



elegaus, Ileude, I. c. p. 2.3, 



viridis, Ileude, I. c. 



pallens, Ileude, I. c. 



Costal plates eight pairs, tbe last not more than half the size of 

 the penultimate, and forming a median suture ; a single neural 

 between the first pair of costals : plates coarsely pitted. Epiplastra 

 separated from each other ; entoplastron forming a right angle ; 

 plastral callosities feebly developed, on the hyo- and hypoplastra. 

 Head moderate, with very short proboscis ; snout (on the skull) 

 short, obtuse, about as long as the diameter of the orbit, which is 

 about double the width of the interorbital space and thrice the 

 width of the postorbital arch ; mandibular symphysis narrower than 

 the diameter of the orbit, without median ridge, lilackish green 

 above, elegantly marked with very numerous roundish yellow spots 

 of unequal sizes ; dorsal shield with interrupted yellow lines, some 

 of which radiate, while others extend across the costal sutures ; 

 plastron mostly greyish. 



Length of dorsal disk 33 centim. 



Yery closely allied to T. eujthraiicxis. 



China. 



a. Ad., spir., skuU .separate. Shanghai. R. Swinhoe, Esq. [C.]. 



(Type.) 



