AKT. 11 NORTH AMERICAN TADPOLES — WRIGHT 35 



1.35. Spiracle 1.40-1.86 nearer eye (5.8-8.6 mm.) than base of hind 



legs or vent (9.2-12.6 mm.), average 1.59. Eye 1.1-1.3 nearer spiracle 



,; (5.8-8.6 mm.) than to snout tip (6.6-8.6 mm.). Nostril 1.1-1.5 



I nearer eye (3.0-4.8 mm.) than snout (4.0-5.2 mm.), average 1.3. 



'< Mouth (4.2-5.0 mm.) usually 1.1-1.5 larger than internasal space 



(3.0-4.6 mm.), average 1.25. Mouth contained 1.3-1.8, average 1.48 



in interorbital distance (5.8-8.0 mm). Internasal space contained in 



interorbital space 1.5-2.2, average 1.8, seldom over 2.0. 



The dimensions of the largest tadpole are : 



Mm. 



Total length 84. 



Body length 28. 



Body depth- 16. 4 



Body width 18. 8 



Tail length 56. 



Tail depth 14. 8 



Musculature of tail 8. 



Spiracle to snout 17. 8 



Mm. 



Spiracle to vent 12. 6 



Spiracle to eye 8. 



Eye to snout 8. 



Eye to nostril 4. 



Nostril to snout 5. 



Mouth 5. 2 



Interorbital distance 7. 



Internasal distance 3. 8 



RANA HECKSHERl Wright 



Plate 8, figures 1, 3 



Color description from life (July 21, 1922). — Body dark greenish 

 olive or olive, finally covered with pale green-yellow or pale greenish- 

 yellow flecks or spots on the dorsum. On venter they are vinaceous 

 fawn, vinaceous cinnamon, or orange vinaceous. Just back of angle 

 of mouth in a mature tadpole and on the venter is a clump of four to 

 six much larger spots. Lower belly pale forget-me-not blue to upper 

 belly and breast jay-blue, Chapman's blue, or grayish violaceous blue. 

 Spots of back become thicker on lower belly and at times almost 

 touch or make patches of color. Lateral line pores very prominent 

 on the head and body. 



Ventral half of muscular part of the tail light salmon orange or 

 apricot buff or vinaceous cinnamon or ochraceous salmon. Upper 

 half of the muscular part with a black band on caudal two-thirds 

 and more or less merged into body color at its basal third. The 

 black bandlike effect is produced by obhque bars of black where the 

 muscle commas are. These overshadow the intervening body color. 

 Whole rim of tail or edge of crests black, least just in front of the 

 vent. 



Iris rim above and below orange-cinnamon, tawny, vinaceous- 

 tawny or orange-rufous or better vinaceous-rufous. Iris rim in front 

 and behind pupil black. 



General appearance. — Tadpole quite large (95 mm.), usually black 

 of body, and the most striking of all our (U. S.) Bana tadpoles. 

 Belly pigmented, so intestine does not show through in preserved 

 specimens. Tail elongate, tip acuminate; dorsal crest not as wide 



