436 PELOBATTD^. 



6. Scaphiopus dugesii. 



Scaphiopus dugesi, Urocchi, Bull. Soc. Philom. (7) iii. 1879, p. 23, 

 and Miss. Sc. Mex., Batr. p. 94, pi. 9. f. 4. 



Tongue subcircular, entire. Yomerine teeth in two small groups 

 on a level with the hinder edge of the choana?. Head small ; snout 

 rounded, rather prominent, -s^dthout canthus rostralis ; nostril nearer 

 the tip of the snout than the eye ; interorbital space as broad as the 

 upper eyelid ; upper feui'face of head smooth : tympanum concealed. 

 Fingers short, with or without a slight rudiment of web, first longer 

 than second ; toes short, the web considerably emargiuate and ex- 

 tending only as a fringe to the tip of the fourth toe ; subarticular 

 tubercles indistinct ; two metacarpal tubercles ; metatarsal shovel as 

 long as first toe. The hiud limb being carried forwards along the 

 body, the tibio-tarsal articulation reaches the shoulder. Head and 

 back tubercular : limbs and inferior surfaces smooth ; a curved fold 

 above the tympanum ; parotoids indistinct. Olive above, spotted or 

 marbled with darker ; metatarsal shovel black. Male with a sub- 

 gular vocal sac, and, during the breeding-season, black rugosities on 

 the inner side of the first two fingers. 



Mexico. 



a-b. (S 2 • Mexico. 



7. Scaphiopus multiplicatus. 



Scaphiopus multiplicatus, Cope, Froc. Ac. Philad. 1803, p. 52 ; 



Brocchi, Miss. >Sc. Me.v., Batr. p. 25. 

 Spea miUtiplicata, Cope, Journ. Ac. Philad. (2) vi. 1866, p. 81. 



Toiigue entire. A^omerine teeth in two fasciculi opposite posterior 

 margins of choaufe. Head very short : snout thick, rounded ; tym- 

 panum covered by a portion of the parotoid gland anterior to this. 

 Metatarsal tubercle rather short, very prominent, 8kin of upper 

 surfaces coarsely tuberculous, that of the crown thick, of the extre- 

 mities nearly smooth ; parotoid very large, extending beyond scapula, 

 bent upon the side, bounded inferiorly by a strong fold, which 

 extends to the groin ; belo-n^ this, on the sides, are two or more 

 others ; from the eye a strong fold passes posterior to the angle of 

 the mouth and across the gular region ; a large gland occupies most 

 of the length of tibia ; abdomen minuteh', pubic region coarsely, 

 rugose. Above ashy brown, below yellowish ash, 



Mexico. 



8. Scaphiopus stagnalis. 



Spea stagnalis, Cope, Yarroic''sRep. V. Zool. p. 525, pi. 25. f. 6-8. 



Tongue round, entire. Vomerine teeth between the choanse, either 

 anteriorly or posteriorly. Eustachian tubes exceedingly minute, 

 much smaller than the choansei Snout projecting beyond mouth ; 

 nostrils terminal : tympanum concealed. Web of hind foot reaching 

 middle of longest toe; tarsal shovel large. The hiud limb being 



