610 MR. G. A. BOULENGER ON THE [NoV. 17, 



greyish-browii spots, which are scarcer on the lower crest ; usually 

 a few deep black spots on the upper edge of the upper crest. 



The largest specimen obtained by me in Brittany measures 

 59 millim.: body 18, width of body 12; tail 41, depth of tail 15, 



The first description and figure of this tadpole were published by 

 Lataste (Actes Soc. Linn. Bord. xxx. 1876, p. 430, pl.x. figs. 7-9). 

 A better figure was given by Heron Royer (13ulL Soc. Zool. France, 

 1878, pL iii. fig. 1). Further descriptions have since been given by 

 Heron Royer and Van Bambeke (l. c. p. 255, pi. xvii. fig. 1) and 

 by Bedriaga (Bull. Soc. Nat. Mosc. 1889, p. 330). 



Rana agilis is now known to inhabit France, from as far north as 

 St. Malo and Paris to the foot of the Pyrenees and the Mediter- 

 ranean coast, a few localities in Western Germany (Strnssburg, Linz 

 on the Rhine, Wiirzburg), Switzerland, Italy and Sicily, Dalmatia, 

 Austria as far north as Prague, Transylvania, Greece, and the 

 Talysh district in Asia\ 



It breeds a little later than R. temporaria, usually, in France, 

 between the middle of February and the beginning of April, but 

 occasionally as late as May (Heron Royer, Bull. Soc. Et. Sc. xlngers, 

 xiv. 1884, p. 125), and the young usually leave the water by the 

 end of June or beginning of July. However, this summer, near 

 Dinard, I captured larvse in which the fore limbs had not yec appeared 

 as late as the 10th August. It is one of these specimens which I 

 have figured on Plate XLV. fig. 7. 



8. Hyla arborea, L. (Plate XLVI. figs. 1-3.) 



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 to the end of the snout. Eyes perfectly lateral, visible from 

 above and from below, a little nearer the spiraculum than to the 

 end of the snout ; tlie 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, 



^ A species closely resembling B. agilis, but the male of which is provided 

 with internal vocal sacs, iiJiabits Ohiua and Japan. The British Museum has 

 recently received several tadpoles of this species, Eanajaponiea, Blgr., obtained 

 in the end of May of this year by Mr. Hoist on Tsu-Shima, islands between 

 Southern Japan and Corea. 



These tadpoles agree with those of R. agilis in their labial dentition, forming 



- series, the first lower series being about half as long as the second ; all four 



lower series uninterrupted. Beak broadly edged with black, without tubercle. 

 Mouth a little wider than the distance between the nostrils, which equals three 

 fifths the width of the interocular space. Lines of muciferous crypts indistinct. 

 Tail twice to twice and one fom-th the length of the body, ending in an obtuse 

 point, its depth three to three and a half times in its length. Caudal crests 

 whitish, with small brown spots. Total length 39 millim. 



