HYLA. 259 



Eggs. — Deposited in several lumps, not exceeding 

 the size of a walnut, attached to weeds below the 

 surface of the water. Vitelline sphere 

 measuring 1-| mm. in diameter, yellow- 

 ish-white with grey or pale brown *£$$^M$L* 

 upper pole ; external adhesive envelop ,f^t?^|^^ 

 not measuring more than 4 mm. in 

 diameter. Each female produces only 

 800 to 1000 eggs. The embryo, when 

 liberated, is yellowish, with rudi- 

 mentary branched external gills, and a well-developed 

 tail. 



Tadpole (PI. II, figs. 6 — 8). — Length of body once 

 and one-third to once and a half its width, about half 

 the length of the tail. Nostrils a little nearer the 

 eyes than the end of the snout. Eyes perfectly 

 lateral, visible from above and from below, a little 

 nearer the spiraculum than the end of the snout ; 

 the distance between the eyes once and a half to twice 

 as great as the distance between the nostrils, which 

 equals the width of the mouth. Spiraculum on the 

 left side, directed upwards and backwards, nearer the 

 posterior than the anterior extremity of the body, not 

 very prominent, but visible from above and from 

 below. Anus opening on the right side, close to the 

 body, above the lower edge of the tail. Tail once 

 and three-fourths to twice and one-third the length 

 of the body, twice to twice and a half as long as deep, 

 acutely pointed, attenuate or mucronate at the end ; 

 upper crest very convex, and extending far forwards 

 on the back, almost to between the eyes ; lower crest 

 as much developed as the upper, and extending on to 

 the belly considerably beyond the anus ; the depth of 

 the muscular portion at its base one- third or rather 

 less than one-third the greatest total depth. 



Beak broadly edged with black. Lips bordered 

 with papillae, which are absent in the middle of the 

 upper border, and usually form two rows on the lower 

 lip. Series of labial teeth f , all except the first lower 



