284 REPORT OF NATIONAL MUSEUM, 1898. 



iuteiual border are keeled and have tlieir elongate apices directed 

 upward. With this exception the scales of the limbs are not keeled. 



The inferior scales of the digits are not keeled or conspicuously 

 augulated. The lateral rows are produced into free flat spinous proc- 

 esses on the three middle fingers, and ou the adjacent (inner) side of 

 tlie fifth. On the toes the fringes are conspicuous on the third and 

 fourth, and are wanting on the first and flftli toes. On the second they 

 arc present, but less elongate on the side next tlie third, and on tlie 

 inner side are only present near the extremity. They extend ou the 

 external border of the sole to near the base of the fiftli digit. The ter- 

 minal exterior scale is much enlarged and folds over the inner edge of 

 the basal lialf of the claw. It is obliquely truncated, distally present- 

 ing a prominent angle at the internal corner, which is pinched and 

 acute. The superior scale in like manner enfolds the external edge of 

 the unguis, and lias a pinched external border which terminates in an 

 acute apex. The two form a conspicuous basal slieath. The inferior 

 plate is longitudinally ridged, while the superior is smooth. Each 

 ungual slieath is excavated for tlie distal half of its internal inferior 

 surface, giving a thin, sliarj) interior edge to the claw. 



Measurements. — Total length, 217 mm.; length to vent, 100 mm.; 

 length to line of axilliB, 47 mm.; length to collar, 30 mm.; length to 

 line of anterior border of ear, 21 mm. ; length of anterior limb, 45 mm. ; 

 length of anterior foot, 17 mm.; length of posterior limb, from groin, 

 77 mm.; length of tibia, 27 mm.; length of posterior foot, 30 mm;; 

 width of head at auricular meatus, 10 mm.; width at shoulders, 23 mm.; 

 width of base of tail, 18 miii. 



The ground color of the upper regions is black, and of the lower, 

 apparently white. The dorsal region is covered with disciform round 

 spots of white (or jjossibly yellow or red in life), whose borders nearly 

 or in some places quite touch. In the center of each disk is a black 

 spot. The pattern resembles that of the pieces of a buttonmaker's 

 refuse. On the neck and occiput the pale disks become confluent, and 

 the superior surface of the head, from the posterior border of the orbits 

 forward is a uniform dirty white. On the ends the pale disks are con- 

 fluent, leaving series of rather numerous small black spots. On the 

 upper surface of the tail the disks are confluent longitudinall}^, leaving 

 some longitudinal black lines. The greater part of the tail is pale, and 

 is very indistinctly marked. The limbs are pale, with minute black 

 specks on the superior aspect of the humerus and femur. On the 

 throat is a black crescent, with the horns turned anteriorly and termi- 

 nating below the external meatus of the ear. Posterior to this is another 

 black crescent of greater transverse extent, whose horns terminate 

 between those of the anterior crescent and the auditorymeatus. Sides 

 of head and neck black spotted. Inferior surfaces unspotted, with the 

 following excei)tions: On each side, halfway bet Aveen axilla and groin, 

 a large subround black spot. On the inferior surface of the tail, on the 



