OCR Text |
Show 604 MR. G. A. BOULENGER ON THE [Nov. 17, But if we compare the maximum length of the tadpole with the maximum length of the adult, we obtain the following order :- Maximum length of adult, from snout to vent. millim. 1. Pelobatesfuscus 80 2. Alytes obstetricans .... 50 3. Pelobates eultripes 85 4. Alytes cisternasii 40 5. Pelodytes punctatus 45 6. Bombinator igneus 45 7. Rana esculenta 110 8. Hyla arborea 50 9. Bombinator pachypus 50 10. Rana agilis 75 11. „ iberica 50 12. „ grceca 50 ? 13. ,, latastii 65 14. „ arvalis 75 15. „ temporaria 85 16. Bufo viridis 85 17. Discoglossus pictus 70 18. Bufo calamita 80 19. „ vulgaris 150 1. RANA ESCULENTA, L. (Plate XLV. fig. 1.) Length of body once and a half its width, or rather less, about half the length of the tail. Nostrils a little nearer the eyes than to the end of tbe snout. Eyes on the upper surface of the body, equidistant from the end of the snout and the spiraculum, or slightly nearer the latter; the distance between the eyes twice to twice and a half as great as that between the nostrils, and much greater than the width of the mouth. Spiraculum on the left side, directed upwards and backwards, a little nearer the end of the snout than to the anus, visible from above and from below. Anus opening on the right side, close to the lower edge of the subcaudal crest. Tail twice and three fourths to four times as long as deep, acutely pointed; upper crest convex, a little deeper than the lower, not extending far upon the back ; the depth of the muscular portion, at its base, about half the greatest total depth. Beak very broadly edged with black, sometimes almost entirely black. Sides and lower edge of the lip bordered with papillae, which usually stand in two rows; upper lip with a long series of fine teeth, followed, on each side, by a short series; three series of teeth in the lower lip, the two outer uninterrupted, the third also continuous or narrowly interrupted, the outermost only one half to two thirds as long as the others. The muciferous crypts are pretty distinct on the head, where they |