J.L. Monk

“ The difficulty with which Batrachians are brought to breed in confinement, whether kept indoors or in the open, is well known to all who have attempted to study the habits of this interesting class of animals. It is also generally believed that when once the annual discharge of the genital products has been interrupted by captivity, the individuals are for ever barren. ”

“ There can be no doubt that three hundred and nine of these eggs can be ascribed to one female, and the balance to the other. These numbers will be seen to be in accordance with the computations of Héron-Royer.
The rapidity with which the embryo develops and breaks through its capsule is striking, two or three of the broods taking only four days to hatch into wriggling larvæ with small four-branched external gills, which disappeared after a few hours.
The gelatinous capsule measured from between 5 and 7 mm.; the vitellus 2·3 mm., dark brown, with large white pale. ”