.64 



PEOCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 74 



sinistral, directed obliquely backward, the opening elliptical. Spira- 

 cle low, exactly on edge of ventral outline. Eye on lateral axis in 

 dorsal aspect just inside the lateral outline and not visible from 

 the venter. Anus dextral, very near or at edge of lower tail crest. 

 Muciferous crypts indistinct. 



MoutTi parts. — Teeth -|. Upper labium fringed with a continuous 

 row of labial teeth; the papillae extend above and inward beyond 

 the end of the upper fringe for about one-fourth to one-seventh of the 

 length of the upper fringe. The end of the second row usually is 

 even with the end of the upper fringe of teeth; the horny beak is 

 contained 1.8-2.0 times in upper fringe. The median space of second 

 upper row very short, eight to ten times in the length of either half. 

 The inner papillae poorly developed, two to three rows at end of 

 three series of lower teeth, not as well developed as in H. femoralis, 

 E. squirella, or H. versicolor. Beneath the third lower labial row no 

 inner papillae or very scarce. The third lower labial row equal to or 

 slightly shorter than the first lower row. The first and second rows 

 of lower teeth are about equal or the second row the longer and 1.5-2.0 

 greater than horny beak. This specigs has the longest second lower i 

 row of its group {H. versicolor, H.femoralis, H. arenicolor, H. squirella). | 



Measurements. — Length of body (11.4-15.4 mm.) in tail (2.0-33 

 mm.) 1.7-2.2, average 1.83. Width (6.4-9.0 mm.) of body in its own 

 length 1.6-2.0, average 1.76. Depth (5.0-7.6 mm.) of body 0.95-1.4 j 

 in body width, average 1.14. Depth of body 1.75-2.3 in body 

 length, average 2.02. Depth (6.0-8.0 mm.) of tail in length of tail \ 

 (20-33 mm.) 2.85-5.15, average 3.73. Muscular part (4.0-5.0 mm.) 

 1.28-1.76 in depth of tail, average 1.62. Spiracle 1.13-1.55 nearer 

 base of hind legs or vent region (5.8-7.2 mm.) than the tip of the i 

 snout (7.8-10.4 mm.), average 1.37. Spiracle 1.44-2.42 nearer eye J 

 (2.8-5.0 mm.) than base of hind legs or vent, average 1.78. Eye j^ 

 1.0-1.7 nearer spiracle (2.8-5.0 mm.) than to tip of snout (4.6- jl 

 6.0 mm.), average 1.36. Nostril nearer eye (2.0-3.0 mm.) than snout \\ 

 (3.6-5.0 mm.), average 2.08. Mouth (3.0-5.0 mm.) usually 0.83-1.7 ' 

 larger than internasal space 2.2-4.0, average 1.3. Mouth contained I 

 1.15-1.95 (average 1.46) in interorbital distance (5.0-7.0 mm.). 

 Internasal space (2.2-4.0 mm.) contained in interorbital space 1.3- 

 2.33, average 1.95. 



The dimensions of the largest tadpole are : 



Total length 50. 



Body length 15. 



Body depth 7. 



Body width 9. 



Tail length 33. 



Tail depth 6. 



Tail, musculature of 5. 



Spiracle to snout 10. 4 



Mm. 

 

 4 

 

 

 

 4 



Mm.l 



Spiracle to vent 7. 0. 



Spiracle to eye 4. 2; 



Eye to snout 8. 01 



Eye to nostril 2. 6i 



Nostril to snout 5. Qi 



Mouth 5.0 



I nterorbital distance 7. 



Internasal distance 4. 



