2G2 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Of the species above deflued, tlie B. columbiensis and the B. lenU(ji- 

 nosus are the ouly ones which display aiij^ great variability, t!ie hitter 

 having four well-defined subspecies. They are also naturally the 

 species which present affinities to other species. Thus the B. lentigi- 

 nosus sometimes approximates, without becoming' confused with, the B. 

 cognatiis, iind the latter in turn varies towards the B. compactilis. 



BUFO PUNCTATUS B. &. G. 



Proceed. Ac. Phila., 1852, p. 173; Baird, U. S. Mex. Bound. Snrv., vol.ii, 

 Rept. p. 25, Plate xxxix ; figs. 5-7 (not good), 1859. 



Bufo leldingn Yarrow, Proceed. U. S. Nat. Mus., 1882, p. 441. 



The head is wide and flat, and enters the total length three and a third 

 times. The width at the posterior borders of the tympana exceeds the 

 length by the diameter of the eyelid. The latter is about four-fifths 

 the very flat interorbital region. The ouly cranial ridge is the vertical 

 one which extends from between the eyelid and the parotoid gland 

 along the front of the tympanic membraue. The latter is very distinct 

 and is nearly round, and is just half the long diameter o^ the eye. The 

 prefrontal bones are rather prominent at the canthus rostralis, and are 

 roughened with raised points. The end of the muzzle is strongly convex 

 in profile, its extremity overlapping the premaxillary border. The 

 nostril is nearer the extremity than it is to the orbit. The granular 

 roughening is present on the extremity of the nose, on the posterior 

 part of the vertex, on the eyelid, the pretympanic ridge, and on the par- 

 otoid gland. The tongue is narrow and subcyliudrical, and the choanee 

 are large and anterior. 



The parotoid glands are subtriangular to round in outline, and are as 

 wide as or wider than long. The warts of the dorsal integument are 

 quite small, and stand nearer together on the sides than on the median 

 region. The derm of the inferior surfaces is not roughened nor granu- 

 lar, except for a short space on the gular region, but is more or less dis- 

 tinctly areolate. The external surface of the arm and of the tarsus and 

 hind foot and of the entire sole is spinulose ; on the superior surface 

 of the tibia the spinulose tubercles are mingled with larger tubercles. 

 When the posterior limb is extended the end of the tarsus reaches the 

 anterior border of the orbit, and from that point in a few instances to 

 the end of the muzzle. The first finger is longer than the second. The 

 posterior foot is rather small, and the web is deeply emarginate to 

 opposite the middle of the first (fourth) plalange of the fourth toe. All 

 the toes have a narrow dermal margin to their extremities. Subdigital 

 tubercles not large, single. The two metatarsal tubercles are distinct, 

 the internal quite narrow, and with prominent obtuse extremity ; the 

 external rounded, and not presenting a free edge. 



In large specimens from Lower California tlie tubercles ar^ coarser, 

 and the granular rugosities of the head smoothed off. There is a trace 



