OCR Text |
Show 598 MR. G. A. BOULENGER ON THE [Nov. 17, cells, the tadpoles of a few genera (Discoglossus, Bombinator, Pelodytes) present a system of fine black lines, most apparent on the caudal crests and the more feebly pigmented parts of the body, which afford excellent characters for their identification. It is a fact worthy of notice that when the end of the tail has been nibbled off, Fig. 3. A. Eana agilis. B. Pelodytes punctatus, 0. Alytes obstetricans. these pigmentary lines are not reproduced on the regenerated portion. These lines were first noticed in Bombinator by Leydig (N. Acta Ac. Leop.-Carol. xxxiv. 1868, p. 105, pi. ii. fig. xix.), in Disco-glossus by Lataste (Actes Soc. Linn. Bord. xxxiii. 1879, p. 304, |