20 



PROCEEDINGS OF THE NATIONAL MUSEUM 



The dimensions of the largest tadpole are: 



Mm . 



Total length 65.0 



Body length 28.0 



Body depth 15. 5 



Body width 18.0 



Tail length 37. 



Tail depth 15. 5 



Musculature of tail 6. 5 



Spiracle to snout 17. 5 



Mm. 



Spiracle to vent 13. 



Spiracle to ej^e 10. 5 



Eye to snout 9. 



Eye to nostril 3. 



Nostril to snout 6. 



Mouth 5. 5 



Interorbital distance 5. 5 



Internasal distance 3. 



SCAPHIOPUS COUCHH Baird 



Plate 6, figure 7 



Color description from life (June 5, 1925). — General appearance 

 bronzy. Black everywhere, finely dotted with old gold, or light 

 grayish vinaceous or vinaceous fawn or orange cinnamon. Some 

 times ail these colors are seen in the different angles of view or bright 

 green yellow be added. Spots sometimes adjoin and form a vermi- 

 culation on dorsum. Entire imderparts are spotted except around 

 the spiracle. Spots less thick on cephalic third of venter. On 

 the caudal two thirds, same spottings as on dorsum, yet intestine 

 shows through the skin. 



Tail. — Upper half of musculature spotted, some of the lower half 

 and tail tip free of spots. Upper and lower tail crests transparent. 



Iris black with spots or dots of the above colors described for 

 dorsum of body. 



General appearance. — Tadpole small (24.5 mm.), broad, head 

 possibly more pointed than tadpole of S. liolhrooTcii. Tail shorter 

 than in S. TiolhrooTcii, tip blunt, rounded. Dorsal and ventral crests 

 as deep as or greater than musculature. Dorsal crest extends on to 

 the body to a vertical as near spiracle as vent or nearer spiracle. 

 Spiracle low, almost ventral, more lateral than in S. holhrooMi. 

 Eyes dorsal, close together, as near mid-dorsai line as lateral outline. 

 Anus median at the end of the edge of the ventral crest. Muciferous 

 crypts in preserved specimens at least indistinct. 



Mouth parts. — Teeth, |-, usually ^, rarely -f-, -| or ^. Whole labium 

 with a continuous row of papillae or inconspicuously broken in the 

 middle of upper labium; inner papillae scarce. First row of teeth 

 very short, or absent; the second row of upper teeth continuous in 

 middle some times barely broken in middle; the third upper row has 

 a wide median interval 2-3 times the first papillary toothed rov/.'-. A 

 ^fifth upper row may be present on each side or only one side. 



On the lower labium are usually four series of teeth, the first two not 

 continuous in the middle, the last two continuous. The interval of 

 second row is veiy short; last lower row of teeth 2.5-3 times in next to 



