48 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



Tail proportionally the longest and most" narrow (depth of tail in 

 length of tail) of any of the HyUds in the United States. Dorsal 

 and ventral crests rather narrow, not equal to the tail musculature in 

 depth. The dorsal crest extends on to the body to the vertical of the 

 spiracle or just ahead of it but nearer spiracle than the eye. Spiracle 

 sinistral, mainly directed backward, only sHghtly upward, and it 

 stands out from body in life almost on the lateral axis. Eye on 

 lateral axis, eye hardly if at all visible from the venter (more like a 

 Ranid tadpole), suborbital region oblique, not vertical as in Hylids in 

 general. Eye in dorsal aspect just inside the lateral outline. Anus 

 dextral, opening on a level with the lower edge of the lower crest. 

 Muciferous crypts not distinct. 



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

 row of labial teeth; the papillary border does not extend above or 

 inward beyond the end of the labial fringe (unlike all our Hylidae of 

 the United States). The end of the second row of upper labial teeth 

 extend beyond the end of the upper fringe for one-third or sometimes 

 almost one-half of the length of this second upper labial row (in H. 

 crucifer one-fourth to one-sixth the length of either lateral row). The 

 median space between the second lateral upper labial rows of teeth 

 long, contained 1.2-0.75 times in either lateral row, i. e., rarely greater, 

 often equal to and more often greater than either lateral row. The 

 horny beak is contained in upper fringe 1.2-1.35 times or 1.35-1.5 

 times in the distance from one end of lateral row to the end of the 

 other lateral row. There are practically no inner papillae. The first 

 row of lower labial teeth about equal to horny beak or slightly larger. 

 The second row of lower labial usually perceptibly longer than the 

 first row (the illustration is a little unusual in this respect). 



Measurements. — Length of body (9.6-13 mm.) in tail (26.6-42.2 

 mm.) 2.5-3.25, average 2.9. Width (5.6-9.0 mm.) of body in its own 

 length 1.44-1.9, average 1.66. Depth (4.8-8.0 mm.) of body 1.0-1.3 

 in body width, average 1.17. Depth of body 1.625-2.1 in length of 

 body, average 2.0. Depth (4.2-7.8 mm.) of tail in length of tail 

 3.25-5.0, average 4.0. Muscular part (2.8-4.4 mm.) 1.3-2.15 in 

 depth of tail, average 1.71. Spiracle 1.6-2.35 nearer base of hind 

 legs or vent region (3.2-5.6 mm.) than the tip of the snout (7.0-10.0 

 mm.), average 1.92. Spiracle to eye usually equal to spu^acle to base 

 of hind legs or vent. Eye 1.0-1.66 nearer to tip of snout (3.0-4.2 

 mm.) than to spiracle (4.0-6.0 mm.), average 1.22. Nostril 1.0-1.33 

 nearer eye (1.4-2.4 mm.) than snout, (1.8-2.8 mm.). Mouth (1.8-2.4 

 mm.) usually 1.0-1.3 larger than internasal space (1.4-2.6 mm.), aver- 

 age 1.06, rarely less than internasal space. Mouth contained 1.3-2.2 

 (average 1.71) in interorbital distance (3.0-4.6 mm.). Internasal 

 space contained in interorbital space 1.33-2.2, average 1.7. 



