1891.] TADPOLES OF THE EUROPEAN BATRACHIANS. 609 



mouth equalling the distance between the nostrils and two thirds the 

 distance between the eyes. Series of labial teeth |, the second upper 

 series very widely interrupted in the middle, the third extremely 

 short ; first lower series very short, hardly half the length of the 

 second, fourth interrupted in the middle. Beak as in R. temporaria. 

 Tail acutely pointed, twice as long as the body, its depth one third 

 its length. 



Lines of muciferous crypts very distinct, as in B. agilis. 



Brown above, whitish beneath ; caudal crests whitish, dotted with 

 dark brown, the upper with some larger spots. 



Total length 44 millim. : body 14, width of body 10 ; tail 30, 

 depth of tail 10. 



R. latastii inhabits Northern Italy and Tuscany. Its tadpole 

 has not been described before. I am indebted to M. Heron Royer 

 for a single specimen, from which the above notes are taken. 



7. Rana AGILIS, Thomas. (Plate XLV. fig. 7.) 



In general form similar to R. esculenta, but snout rather shorter, 

 the nostrils being equidistant from the eyes and the end of the snout, 

 and spiraculum considerably nearer the posterior than the anterior 

 extremity of the body. Interocular space twice as great as the 

 distance between the nostrils. Tail twice to twice and a half as long 

 as the body, pointed and attenuate or submucronate at the end, its 

 depth about twice and two thirds in its length; upper crest very 

 convex, deeper than the lower, and extending upon the back as far 

 as the level of the spiraculum. 



Beak broadly edged with black, usually with a black tubercle or 

 knob in tiie middle of the basal part of the upper mandible, which 

 may be accompanied by a smaller one on each side. Usually 

 two series of papillae bordering the lower lip. Labial teeth in 

 7 series, the second and third upper short and widely separated in 

 the middle, the first lower short, the three others nearly twice as 

 long and uninterrupted, or the fourth very narrowly interrupted in 

 the middle. 



Very distinct lines of crypts on the head and body. One of these 

 lines forms a hoop, the ends of which approach on the upper lip, 

 passing above the nostrils and bordering the eye above and' below ; 

 another begins behind the eye and bifurcates, the upper branch 

 extending to the upper caudal fin, the lower to the middle of the 

 muscular portion of the tail ; a small branch may descend on each 

 side at a short distance behind the eye, forming a sigmoid curve ; 

 another, curved line on each side, bordering the spiraculum above, 

 (c/. fig. 3, A, p. .598). 



Pale brown or rufous above, with dark brown spots ; sides with 

 roundish golden spots between a brown or reddish network ; belly 

 white, with pale golden or mother-of-pearl spots ; throat pink ; 

 muscular portion of tail pale brown or yellowish, with small brown 

 or grey spots ; caudal crests greyish white, with white and small 



41* 



