HERPETOLOGY OF JAPAN, 



521 



shell a raised keel anteriorly as broad as interorbital space and eye- 

 lids together, posteriorly not wider than this space plus half an eyelid ; 

 on each side of the keel a perceptible depression, the skin of 

 the carapace with numerous more or less disrupted, raised, longitudinal 

 lines studded with tubercles, these lines being more wavy and parallel 

 with the axis of the body near the middle of the back, and straighter, 

 less tubercular, and more parallel with the periphery toward the edge 

 of the carapace; the tubercles gather into a large cluster on the nuchal 



Figs. 404-405.— Amyda japonica. 



^ NAT. SIZE. 404, UNDEESIDE (IJ X NAT. SIZE); 405, SIDE OF HEAD. 



No. 2n77, U.S.N.M. 



portion of the keel, and a still greater number of lairger tubercles con- 

 gregate near the posterior end of the bony disk and the adjoining pos- 

 terior portion of the soft flap; plastron flat, smooth, the posterior 

 lobe short, its width at base equaling one-half the length of the plas- 

 tron; greatest height of body equals one-fourth the length of carapace. 

 Color (in alcohol) above clear greenish olive, with a few indistinct 

 brownish blotches on the carapace, underneath uniform pale buff; 

 head with a number of narrow blackish lines, as follows : A transverse 



