286 BXTJONID^. 



*** Jaws norma]. 



t Snout not prominent. 

 t Tympanum more than half the width of the eye, 

 perfectly distinct. 

 Parotoids narrow, elongate, pointed be- 

 hind; tarso-metatarsal articulation not 



reaching the eye 55. arenarum, p. 314. '^~^ 



Parotoids enormous 57. marinus, p. 315. ^^ 



Parotoids moderate, elongate ; tarso-me- 

 tatarsal articulation reaching in front 



of the eye, or beyond 58. crmifer, p. 316. ^— 



Parotoids short, round or subtriangular - 62. valliceps, p, 319. 



Toes nearly free 63. melanochlorus, p. 320. 



First finger not extending beyond second 69. sternosignatus, p. 323. 



XX Tympanum less than half the width of the eye, 

 or indistinct. 

 Tympanum perfectly distinct; a tarsal 



fold ; a lateral dermal fold 56. molitor, p. 315. 



Tjrmpanum distinct in its anterior half ; 



fingers remarkably elongate 65. aurifus, p. 321. 



Tympanum hidden ; fingers very slender. 66. veraguensis, p. 321. 

 Tympanum distinct, one fifth orbit ; toes 



shortly webbed 67. coccifer, p. 322. 



ft Snout prominent, contracted. 

 No tarsal fold ; interorbital space narrow. 70. canaliferus, p. 323. 

 No tarsal fold ; interorbital space slightly 



broader than the upper eyelid 72. granulosus, p. 324. '^ 



A tarsal fold; no preorbital ridge 71. argillaceus, p. 324. 



A tarsal fold 73. gutturosus, p. 324. 



b. Upper eyelid produced in a 



horn-like dermal appendage. 60. ceratophrys, p. 319. 



2. No tympanum. 



Derm of head involved in cranial ossifi- 

 cation 76. fastidiosus, p. 326. 



Digits inclosed in the skin, leaving the 

 longest projecting 77. epiotieus, p, 326. 



1. Bufo borbonicus. 



Bufo cruentatus, Ctilnth. Cat. p, 62. 

 Hylaplesia horbonica, Boie, Isis, 1827, p. 294 ; TsckvM, Batr, p. 70 ; 



Peters, Mm. Berl. Ac. 1863, p. 81, & 1867, p. 34. 

 Bufo cruentatus, Tschudi, Batr. p. 88 ; Dum. §■ B'ibr. p. 62. 

 borbonicus, Cope, Joum. Ac. Philad. (2) vi. 1867, p. 193. 



Habit slender. Crown without bony ridges ; snout obliquely 

 truncate, with angular canthus rostralis; loreal region vertical; 

 interorbital space broader than the upper eyelid ; tympanum small. 



