18 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



(2.0-3.0 mm.), average 1. 9. Mouth (3.0-4.0 mm.) usually 1.66-2.5 

 larger than internasal space (1.2-2.0 mm.), average 2.08. Mouth 

 usually contamed 1.0-1.66 larger (average 1.3) than in interorbital 

 distance (2.0-3.2 mm.). Internasal space contained in interorbital 

 space 1.28-1.83, average 1.56. 



The dimensions of the largest tadpole are : 



Mm. 



Totallength 28. 



Body length 12. 



Body depth 5. 



Body width 6. 4 



Tail length 16. 



Tail depth 4. 4 



Tail musculature of 3.0 



Spiracle to snout 7.6 



Mm. 



Spiracle to vent 6. 



Spiracle to eye 5. 2 



Ej'e to snout 3. 6 



Eye to nostril 1.8 



Nostril to snout 2. 4 



Mouth 3. 



Interorbital distance 3. 



Internasal distance 2. 



SCAPHIOPUS HAMMONDH Baird 



Plate 6, figures 4, 5 



Color description from life {July 12, 1925). — Back olive lake in gen- 

 eral appearance. The belly color with black of back gives the olive 

 lake or buffy citrine color. Back marbled with bright green yellow or 

 Ught green and black giving general color above. Ahead of eye old 

 gold appearance. 



Tail. — Lower part and tip of tail musculature black. Top of 

 cephalic half of musculature colored as the dorsum of body. A solid 

 line of bright green yellow or light yellow green on top of musculature. 

 Tail fins clear with rufous or bittersweet orange suffusion in parts 

 and on the edges. Iris above and below pupil with half moon of 

 lemon yellow; black vertical bar in front and behind pupil. Rest of 

 eye black with dottings of bright green yellow. The tadpoles some- 

 times appear clay colored, or of vinaceous or buffy tints or very pale 

 to pale olive buff or tilleul buff. 



General appearance. — Tadpole large (65.0 mm.), broad, and not 

 deep. Body from dorsal aspect is sometimes almost round. Dorsal 

 and ventral sides of the front part of the body flatten out to a canthus- 

 like edge in which the mouth seems, when not open, to be a mere slit. 

 Tail medium to short; tail tip rounded. Dorsal and ventral crests 

 about equal to depth of the musculature or sometimes less than it. 

 The dorsal crest extends on to the body to a vertical ahead of the hind 

 legs but not beyond the midway vertical between the hind legs and the 

 spiracle. Spiracle very low, almost ventral, far below lateral axis 

 and about on a level with mouth parts. Spiracular opening a long 

 oblique slit directed backward and upward. Eye dorsal but on the 

 lateral axis. Eyes close together, much nearer mid-dorsal line than 

 lateral outline. Anus median, at the end of the edge of the ventral 



