1883] NATURAL SCIENCES OF PHILADELPHIA. 31 



loreal scuta. Throe loreals, increasing in size posteriorly. A 

 circle of scales surrounds the eye, of which the superior or super- 

 ciliary are the largest. The latter are separated by one row of 

 scales from the parietal, supraorbital and frontal on each side. The 

 interfrontonasal is nearly square. The frontonasals are consider- 

 ably in contact. The frontal is hexagonal, and is broader than 

 long. The interparietal is as large as each parietal. It is longer 

 than wide, and notches the contact of the frontoparietals. The 

 occipitals are large and quadrate. A single large temporal bounds 

 the parietals and occipital, and it is followed by two small scuta 

 which are in contact with the occipital. There are eight scales on 

 the upper lip. Of these the fifth is the largest, and is part of an 

 annulus which begins with two small scales at the posterior 

 loreal, and terminates at the seventh scale, opposite the middle 

 of the pupil posteriorly. The posterior labials are small, and are 

 separated by nine rows of still smaller scales from the large 

 temporal. No large auricular scales. The eye is rather large 

 and its diameter is contained in the length of muzzle in front of it 

 l't5 times. The vertical diameter of the auricular meatus is a 

 little less. 



The first digits of both extremities are very short. The second 

 of the pes is very little longer than the fifth. All the ungues are 

 acute and are moderately curved. The hind-legs are remarkably 

 short, not exceeding the fore-legs. Extended forwards the ex- 

 tremity of the fourth digit reaches the elbow of the appressed 

 fore-leg. Femoral pores twelve on each side ; no anal pores. The 

 tail is not long, and its form is compressed with a flat inferior 

 surface. The section is a triangle, higher than wide, with the 

 apex narrowly truncate. 



The color is light brown, with dark umber-brown spots on the 

 superior surface. These spots foi»m, in general, one median and 

 two lateral rows, but as their forms are verj- irregular this order 

 is obscure. The median dorsal are the largest, and they send 

 branches laterally and anteroposteriorly, so that the result is rather 

 confused. Dark brown bands cross the muzzle on the frontonasal 

 plates and on the frontal, and form a wide U from the fronto- 

 parietals passing around the posterior edge of the occipitals. 

 Sides of head with rather large brown spots. Inferior surfaces 

 with minute brown spots which are least numerous on the middle 

 line. Tail with irregular pale spots. 



