PHRYNOSOMA CORNUTUM. 405 



the axillae and the groins smaller in the lower than in the upper 

 series ; on the sides of the tail, they are disposed upon a single, irre- 

 gular series, which does not extend to its tip. The abdominal scales 

 are all distinctly keeled ; there is a large and conspicuous transverse 

 series upon the anterior part of the chest, followed by four or five con- 

 siderably smaller, though still larger than the abdominal ones, pro- 

 perly so called, and which are uniform, rather small, subquadrangular, 

 and posteriorly very acute ; upon the middle of the preanal region, 

 again, they are larger than upon the abdomen. The tail is broad at 

 the base, very much depressed, subconical, and tapering into a point 

 backwards. The scales of its inferior surface are keeled, and rather 

 larger than the abdominal ones. 



The limbs are tolerably well developed ; still, the anterior pair, 

 when bent backwards, is far from reaching the groins, whilst the pos- 

 terior pair, by being brought forwards, reaches the shoulder with the 

 extremity of the toes. Both the arm and forearm are covered supe- 

 riorly and anteriorly with conspicuous, large, and keeled scales; smaller 

 ones, though keeled, still cover the inferior aspect of these organs. 

 About the axillae and inner aspect of the elbow, the scales become 

 small and granular. The upper and anterior surface of the hind limbs 

 exhibit a squamation very similar to that of the back. On the inferior 

 surface of the thighs, the scales resemble more those of the abdomen, 

 though smaller, being likewise keeled. There are fifteen or sixteen 

 femoral pores under each thigh, extending from the knee to the inter- 

 femoral region, over which they are not continuous. On the inferior 

 surface of the leg, properly so called, the scales are well developed, 

 and strongly keeled. The hands and feet, the fingers and toes, are 

 scaly to the very base of the nails, and the scales conspicuously keeled. 

 Three upper and three inferior series of scales may be observed around 

 the fingers and toes, with a slight tendency to assume a verticillated 

 aspect, particularly underneath. The nails are well developed, slightly 

 curved, compressed at the base, acute, and tapering at the apex. 



The ground color assumes various shades of yellow. There is a 

 transverse black streak between the supraocular spines, and one across 

 the vertex ; the snout, about the nostrils and the margin of the jaw, 

 is maculated. A similar streak extends from beneath the eye, across 

 the angle of the mouth ; another still, stretches across the temporal 

 region, from the eye to the extremity of the external temporal spine. 

 The occipital spines are brownish. A large blackish patch on each 



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