, and total length of 25.9 mm. (23.0-27.5 mm.). The
largest tadpole examined is in stage 40 and has a total length of 34.5
mm. (Table 6).

A typical tadpole, stage 35 of development (KU 104134, from Puerto
Viejo, Heredia Province, Costa Rica), has a body length of 9.1 mm.,
tail length of 17.7 mm., and a total length of 26.8 mm. Other
characters are as follows: body depressed anteriorly; body length
greater than depth of tail; internarial space as broad as interorbital
distance; nostril equidistant between eye and tip of snout; eyes
moderately large; mouth anteroventral and triangular; median fourth of
upper lip bare; rest of lip bordered by one row of papillae; clumps of
small papillae at corners of mouth; tooth rows 2/3; upper rows equal in
length; second row interrupted medially; lower rows shorter than upper
rows, diminishing in length; beak rather weak with small serrations;
spiracle short and nearer eyes than anus; anal opening not reaching
edge of ventral fin; caudal musculature attenuated distally (Figs. 2B
and 3B).

TABLE 6.--Sizes of Tadpoles of _Hyla elaeochroa_ in Relation to
Developmental Stages. (Means in parentheses below observed ranges;
measurements in mm.)

------+---+-------------+-------------+--------------
Stage | N | Body length | Tail length | Total length
------+---+-------------+-------------+--------------
24 | 2 | 4.0-4.0 | 8.5-9.0 | 12.5-13.0
| | (4.0) | (8.8) | (12.8)
| | | |
25 |64 | 5.0-6.5 | 8.5-15.0 | 13.5-21.5
| | (5.7) | (11.8) | (17.6)
| | | |
27 |30 | 7.0-7.5 | 13.0-16.0 | 20.0-23.0
| | (7.1) | (14.2) | (21.3)
| | | |
30 |15 | 7.0-8.0 | 13.0-16.5 | 20.0-24.0
| | (7.3) | (15.0) | (22.4)
| | | |
32 |30 | 7.5-8.5 | 15.0-17.0 | 22.5-25.0
| | (7.8) | (16.1) | (23.8)
| | | |
35 |35 | 8.0-9.0 | 15.0-19.5 | 23.0-27.5
| | (8.1) | (17.7) | (25.9)
| | | |
37 |22 | 8.5-9.5 | 16.0-22.0 | 25.0-31.0
| | (9.0) | (18.8) | (27.8)
| | | |
39 |14 | 9.5-10