1. TRIONYX. OTST 
metrical black spots or bands; young usually with a pair of black 
spots in front of the tail, and a black band on the hinder side of 
the thighs. 
Length of dorsal disk 20 centim. 
China and Japan. 
a-g. Ad., hger., & yg., Chefoo. R. Swinhoe, Esq. [C. ]. 
spir. 
ee k-r. Ad., spir., Shanghai. R. Swinhoe, Esq. [C. ]. 
skull separate. 
s. Ad., spir. Shanghai. (Type of Landemania trrorata.) 
t—-u. Her., spir. Shanghai. 
v. Ad., skel. Shanghai. 
w-y. Yg., spir. Mountains N. of Mr. Pratt [C.]. 
Kiu-Kiang. 
z-B. Hgr. & yg., spir. Chusan. Dr. Cantor. (Types of 7. 
tuberculatus and T. perocellatus.) 
y. Ad., spir. Foo Choo. St. Petersburg Museum | E. }. 
d-e, ¢ Ad. & her., Formosa. R. Swinhoe, Esq. [C. }. 
spir., skull separate. 
7» Yg., spir. China. Dr. B. Seeman [C.]. Haslar 
Collection. 
6. Ad., stifd. China. 
x. Ad., skel. China. 
10. Trionyx swinhonis. 
Oscaria swinhoei, Gray, Ann. § Mag. N. H. (4) xii. p. 157, pl. v. 
1873). 
en leprosus, Heude, Mém. Hist. Nat. Emp. Chin. i. p. 20 (1880). 
maculatus, Heude, 1. c. p. 22, pl. i. 
elegans, Heude, 1. c. p. 23. 
viridis, Heude, l. ¢. 
pallens, Heude, 7. ¢. 
Costal plates eight pairs, the 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. Blackish 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. 
Very closely allied to 7. euphraticus. 
China. 
a. Ad., spir., skull separate. Shanghai. R. Swinhoe, Esq. [C.]. 
(Type-) 
