A typical tadpole in stage 38 of development (KU 104162, 5 km ESE Córdoba, Veracruz, México) has a body length of 10 mm., tail length of 19.5 mm., and a total length of 29.5 mm. Other characters are as follows: body as deep as wide, depressed anteriorly; body as long as depth of tail; interorbital space greater than distance between eye and snout but equal to internarial space; nostril equidistant between eye and tip of snout; distance between spiracle and eye less than distance between eye and snout; eyes large, situated dorsolaterally; mouth anteroventral, approximately triangular in outline; one row of papillae covering lower lip and all except median fourth of upper lip; scattered papillae at corners of mouth; tooth rows 2/3; first upper row entire, second row interrupted medially, shorter than first; lower rows shorter than upper rows; beak weak; spiracle short and nearer eyes than anus; anal opening not reaching edge of ventral fin; dorsal fin barely extending onto body; caudal musculature pointed distally. TABLE 8.--Sizes of Tadpoles of _Hyla s. staufferi_ in Relation to Developmental Stages. (Means in parentheses below observed ranges; measurements in mm.) ====================================================== Stage | N | Body length| Tail length | Total length --------+---+------------+-------------+-------------- 25 | 3 | 6.0-7.0 | 12.0-13.0 | 18.0-20.0 | | (6.7) | (12.5) | (19.2) | | | | 26 | 2 | 7.0-7.5 | 14.0-15.0 | 21.5-22.0 | | (7.3) | (14.5) | (21.8) | | | | 27 | 9 | 7.0-8.0 | 13.0-17.0 | 21.0-25.0 | | (7.6) | (14.5) | (22.0) | | | | 32 | 1 | 8.5 | 15.5 | 24.0 | | | | 36 | 2 | 8.0-10.0 | 16.5-17.0 | 25.0-26.5 | | (9.0) | (16.8) | (25.8) | | | | 38 | 6 | 9.0-10.0 | 19.0-20.5 | 28.0-29.5 | | (9.6) | (19.5) | (29.1) | | | | 41 | 1 | 10.0 | 14.0 | 24.0 | | | | 42 | 6 | 11.0-14.0 | 10.0-13.0 | 20.0-29.0 | | (11.8) | (11.9) | (24.8) | | | | 45 | 1 | 12.5 | 0.5 | 13.0 | | | | 46 | 1 | 13.0 | -- | -- In life, body pale olive-tan, belly silvery white with pinkish-orange reticulations in some specimens; tail creamy white with silvery flecks and black or brown reticulations. In preservative, tan and pinkish-orange coloration lost; body transparent, reticulations on tail present.