III. On the structure and development of the skull in the batrachia. Part III

Some of the work brought forward in this paper was in hand before the first part was in print. That initial piece of work dealt only with the formation of the skull in the common frog, but it was followed by another which appeared in the (i Philosophical Transactions in 1876, which treated of the skulls of thecommon and of the “ aglossal ” toads. Of the latter types only two kinds are known, viz., the nailed toad of the Cape (Dactylehra ), and the monstrous toad of Surinam (pipa ). All the bulk of the Batrachia are included in the sub group “ Opisthoglossa,” these have a tongue, and in most cases it is freebehind and not in front; the “ Proteroglossal ” Batrachia are very few in number, and the character itself (as Dr. Günther informs me) is not well pronounced.