460 



REPORT OF NATIONAL MUSEUM, 1898. 



these there are about 31 or 32 in au oblique series across the belly. 

 They extend from the throat to the tail and quite similar ones are to be 

 seen on the entire inferior surface of the hind legs and the anterior of 

 the front legs; the latter more convex. 



The upper surfaces of the legs are like the back, but the tubercles 

 are less regular. The posterior face of the arm and femur over the 

 sides, except above, are covered with uniform small scales, those on the 

 femur being abruptly smaller behind than inferiorly. 



The legs are short, the hinder especially. The digits are all nearly 

 equal, increasing in length from the first to the third, which is about 

 equal to the fourth and fifth. They are connected at the base by a 

 web. They are depressed, their under surface with a series of short, 

 transverse, rather tubercular lamell;^, and they terminate in a flattened 

 obcordate or subquadrate expansion, which is perfectly smooth and flat 

 beneath, with'a central longitudinal groove, and emarginate or cordate 

 at the end, to receive the point of the sharp, apparently retractile, claw. 



The tail is cylindrical, thickened, but attenuated at the end, and not 

 quite as long as the head and body; it is contracted at the base and 

 covered pretty regularly with small scales in indistinct whorls, and about 

 as large as those on the belly. The under surface, however, is occupied 

 by a series of broad transverse plates, beginning a short distance 

 behind the anus. On the upper surface, too, are four rows of the large 

 tubercles, continued from the arch, on as many slight ridges, separated 

 by furrows, the central of which is the largest. The tubercles of each 

 series are separated by an interval of about three of the smaller scales. 

 On each side the base of the tail and above the anus is an oblique series 

 of three spinous tubercles. There are two exposed cavities behind the 

 anus (containing the penes?), but there are no femoral or preanal pores. 



This specimen sufficiently resembles the species described by Wieg- 

 mann to belong to it, except that the ventral scales are smooth, not 

 carinated, and uniform, not mixed with smaller ones. 



riiyllodactylus tuberculosis Wiegmann. 



Besides the above locality, the city of Chihuahua yielded a specimen 

 to E. Wilkinson. It is abundant in southern and western Mexico. 



PHYLLODACTYLUS UNCTUS Cope. 



PhyllodavtyluH vvctiis Bocourt, Miss. Sci. dc Mex. Kept., 1873, p. 43.— Boulen- 

 GEU, Cat. Liz. Brit. Mus., 2a ed., I, 1885, p. 94.— Cope, Bull. U. S. Nat. Mus., 

 No. 32, 1887, p. 28.— Van Denburgh, Proc. Cal. Acad. Sci., 1895, V, p. 86. 



Diplodactylus unctus Cope, Proc. Acad. Nat. Sci. Phila., 1863, p. 102; 1866, p. 312; 

 Bull. U. S. Nat. Mus., No. 1, 1875, pp. 50, 93.— Streets, Bull. U. S. Nat. Mus., 

 No. 7, 1877, p. 35.— Yarrow, Bull. U. S. Nat. Mus., No. 24, 1883, p. 73.— S. 

 Garman, Bull. Essex Inst., XVI, 1884, p. 12.— Belding, West Amer. Scientist, 

 III, 1887, p. 98. 



