24 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



mm.), average 1.28. Eye 1.0-1.27 nearer to tip of snout (2.2-3.4 

 mm.) than to spiracle (2.0-4.0 mm.), average 1.16. Nostril nearer 

 eye than snout. Mouth (1.8-2.6 mm.) usually 1.4-2.2 larger than 

 internasal space (1.0-1.5 mm.), average 1.76. Mouth contained 

 0.77-1.0 (average 0.92) in interorbital distance (1.8-2.4 mm.). Inter- 

 nasal space contained in interorbital space 1.3-1.8, average 1.6. 

 The dimensions of the largest tadpole are: 



Mm. 



Total length 27. 8 



Body length 10.2 



Body depth 5.6 



Body width 7. 4 



Tail length 17.6 



Tail depth 5. 



Musculature of tail 2. 4 



Spiracle to snout 7. 4 



Mm. 



Spiracle to vent 4. 8 



Spiracle to eye 4. 



Eye to snout 3. 4 



Eye to nostril 



Nostril to snout 



Mouth 2.4 



Interorbital distance 2. 4 



Internasal distance 1.4 



BUFO from Raleigh, N. C. 



Plate 1, figure 8 



General appearance. — Body small (27 mm.), ovoid, greatest width 

 nearer the vertical of the vent than that of the eyes. Dorsal crest 

 low, extends onto the body slightly, to a vertical just ahead of the 

 hind legs. Dorsal and ventral crests about equal, and about equal 

 in depth to tail musculature. Spiracle sinistral, directed mainly 

 backward, somewhat upward, below lateral axis. Eye just above 

 lateral axis. Eyes dorsal close together slightly nearer lateral out- 

 line than mid-dorsal line. Anus median, opening on or slightly 

 below the lower edge of lower crest. Muciferous crypts indistinct. 



Mouth parts. — Teeth ^. Upper labium fringed with a continuous 

 row of labial teeth, the papillae extending only to each end of the up- 

 per fringe. The end of the second upper row of teeth does not extend 

 beyond the end of the upper fringe. The median space between the 

 two parts of the second row is contained 1.3-3.0 times in either lat- 

 eral row. Horny beak contained 1.4-1.5 times in the upper fringe 

 1.2-1.3 times in first or second lower labial row of teeth and slightly 

 larger than the third row. The third row is contained 1.3-1.6 times 

 in the first lower row. One row of papillae from end of upper fringe 

 to end of third lower row of teeth. On lower loop at end of third 

 lower row only two or three scattering inner papillae. This loop of 

 papillae extends slightly underneath the end of the third row as 

 in B. terrestris. The papillary border in general is more like that 

 of B. americanus. 



Measurements. — Length of body (8.4-11.0 mm.) in tail (12.4-17 

 mm.) 1.2-1.7, average 1.43. Width (5.6-6.4 mm.) of body in its 

 own length 1,4-1.77, average 1.62. Depth (4.0-5.0 mm.) of body 

 1.2-1.5 in body width, average 1.3. Depth of body 1.75-2.35 in 



