ABT. ]1 NORTH AMEKICAN TADPOLES — WRIGHT 21 



last row. Sometimes above the normal first row may occur a fifth 

 series. 



Measurements. — Length of body (10-11 mm.) in tail (14-15.5 mm.) 

 1.3-1.5, average 1.4. Width (7.0-8.5 mm.) of body 1.3-1.6 in its 

 own length (10-11 mm.), average 1.4. Depth (5.4-6.0) of body, 

 1.25-1.55 in body width, average 1.35. Depth of body 1.66-2.0 in 

 body length, average 1.9. Depth (5.0-6.0) of tail in length of taU 

 2.5-2.9 average 2.65. Muscular part (1.8-2.5), 2.2-3.33 in depth of 

 tail, average 2.7. Spiracle 1.16-1.6 nearer tip of snout (5.0-6.0) 

 than base of hind legs or vent (6.0-8.0) average 1.3. Spiracle 1.5-2.2 

 nearer eye (3.2-4.5) than base of hind legs or vent (6.0-8.0), average 

 1.85. Eye 1.0-1.6 nearer to tip of snout (2.8-3.4) than to spiracle 

 (3.2-4.5) average 1.3. Nostril 1.4-2.2 nearer eye (1.0-1.6) than 

 snout (2.18-3.4) average 1.85. Mouth (2.4-2.8) usually 1.5-2.15 

 larger than internasal space (1.2-1.6) average 1.85. Mouth con- 

 tained 1.0-1.33 average 1.12 in interorbital distance (2.0-3.2). In- 

 ternasal space contained in interorbital space 1.45-2.3, average, 2.0. 



The dimensions of the largest tadpole are: 



Mm. 



Total length 24. 5 



Body length 11. 



Body depth 5. 5 



Body width 8. 5 



Tail length 14. 5 



Tail depth 5. 



Musculature of tail 2. 



Spiracle to snout 6. 



Mm. 



Spiracle to vent 6. 



Spiracle to eye 4. 



Eye to snout 3. 



Eye to nostril 1. 



Nostril of snout 2. 2 



Mouth 2.6 



Interorbital distance 3. 



Internasal distance.. 1. 4 



BUFO TERBESTRIS Bonnaterre 



Color description from life {July 7, 1921). — General color is black 

 with scattered dots, which are pale purplish vinaceous. Venter 

 black with few scattered light purplish vinaceous spots, but not 

 clustered to make one continuous mass of color as on the belly of 

 B. quercicus. 



Tail. — Upper crest spotted, but not so strongly as in Bufo quercicus. 

 Lower crest almost clear of spots. Lower edge of muscular part 

 white or light chalcedony yellow. 



General appearance. — Body small (26 mm.), ovoid, broader nearer 

 vent than eyes. Dorsal aspect shows body decidedly tapers ahead of 

 the eyes. Dorsel crest low, extends but slightly on to the body 

 to a vertical just ahead of the buds of the hind legs. Dorsal and 

 ventral crests about equal and about equal to the depth of the mus- 

 culature. Tail short, tip rounded. Spiracle sinistral, directed mainly 

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

 lateral axis. Eyes dorsal, close together, slightly nearer lateral 

 outline than mid-dorsal line. Anus median, opening in a level lower 



