104 EMYS PSEUDO-GEOGRAPHICA. 



second and third are pentagonal, the fourth is quadrilateral, larger below and 

 joined to three marginal. Of the marginal plates the nuchal, or intermediate, is 

 trigonal, with the apex truncated and directed forwards, and the basis backwards, 

 with a small triangular notch to be received on the point of the anterior vertebral; 

 the anterior marginal is pentagonal, with its anterior and external border project- 

 ing beyond the second; the remaining plates are quadrilateral; those on the flanks 

 are revolute, and make a groove or gutter; and the five posterior are slightly 

 notched, with their posterior and external angle projecting so much as to give a 

 serrated appearance to the posterior margin of the shell. 



The sternum is full and entire in front, and deeply emarginate behind; the gular 

 plates are short and triangular, their bases before, their apices behind, with a 

 projecting spine or knob at their outer and anterior angle; the brachial are also 

 triangular, with bases rounded and turned outwards, and apices turned inwards 

 and truncated; the thoracic are oblong, quadrilateral, narroAv in the antero- 

 posterior direction; the abdominal are nearly square, their outer margin offering 

 three facets for joining the marginal and supplementary plates; the femoral are 

 irregularly quadrilateral, broader w ithout and rounded, with their posterior and 

 external angle lengthened out beyond the sub-caudal in a point; the sub-caudal 

 are trapezoid in form. Of the supplementary plates the axillary are large, oblong 

 and pentagonal; the ingumal are also large and rhomboidal. 



The head is small; the snout is pointed; the nostrils are anterior, small and 

 closely approximated; the jaws are entire or without serra?; the upper is slightly 

 emarginate in front, and the lower is provided with a small tooth; the eyes are 

 moderately large, the pupil black, the iris of a rich golden colour, with a small 

 black horizontal band, not however extending completely through it. 



The anterior extremities are rounded at the shoulder, flattened at the carpus, 

 and covered with large scales in front and smaller behind, with a series of scales 

 on the ulnar margin of the fore-arm; there are five fingers, palmated and furnished 

 with five slender nails, moderately long and slightly curved. The posterior 



