42 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



another behind eye and underneath as infraorbital to nostril. The 

 portion behind the eye sends off an upward and backward loop 

 which immediately swings downward parallel with the infraorbital 

 for a short distance, then it descends directly downward to level of 

 upper jaw to be, and turns at right angles forward toward the mouth. 

 Another lateral row forms a loop around the tip of the spiracle. 



Mouth parts. — Teeth -|. Edge of upper labium fringed with teeth, 

 the fringe about the length of the horny beak, or somewhat longer. 

 In either corner, beneath this fringe is short row of teeth one-sixth to 

 two-fifteenths the length of the upper fringe. The outer end of the 

 lateral row does not reach beyond the edge of the upper fringe. 

 The medium space between these two rows is three and one-half to 

 four and one-half times the length of either row. From above the 

 end of the first upper labial row down to the end of the third lower row 

 are two or three irregular rows of papillae inside the outer row of papil- 

 lae. These inner to the end of the third row and in one case where 

 the third row is lost it is replaced by papillae inside the usual single 

 row across lower labium. Third lower row therefore about equal to 

 the single row of papillae on lower labium, much less than horny 

 beak, and one-third shorter than the first row of lower labial teeth. 

 The first and second rows are about equal to horny beak. The first 

 one often subdivided. In general it is much like R. grylio and one 

 adult tadpole has a black line of spots on dorsal crest much like R. grylio 

 tadpoles. 



Measurements. — Length of body (24-33 mm.) in tail (45-67 mm.) 

 1.66-2.1, average 1.88. Width (13.5-23.0 mm.) of body in its own 

 length 1.3-2.1, average 1.56. Depth (11-19.5 mm.) of body 1.14- 

 1.33 in body width, average 1.23. Depth of body 1.64-2.16 in body 

 length, average 1.85. Depth (12.0-19.0 mm.) of tail in length of 

 tail 3.2-4.7, average 3.87. Depth of tail 0.85-1.1 in body depth, 

 average 0.97. Muscular part (8.5-13.0 mm.) 1.3-1.9 in depth of 

 tail, average 1.48. Spiracle 1.2-1.8 nearer base of hind legs or vent 

 region (9-18 mm.) than the tip of the snout (16.0-22.5 mm.), average 

 1.37. Spiracle 1.25-1.6 nearer eye (6.5-12.5 mm.) than base of hind 

 legs or vent, average 1.45. Eye 1.-1.4 nearer tip of snout (8-11 mm.) 

 than spiracle (8.0-12.5 mm.), average 1.14. Nostril 1.0-1.6 nearer 

 eye (4.0-5.5 mm.) than snout (4.0-6.5 mm.), average 1.16. Mouth 

 (4.5-6.5 mm.) usually 1.0-1.3 larger than internasal space (4.0-6.0 

 nam.), average 1.11. Mouth contained in interorbital distance (6.5-9 

 nam.) 1.3-1.75 times, average 1.55. Internasal space contained in 

 interorbital space 1.4-1.9, average 1.7. 



