586 Miss Joan B. Procter on a new Toad. 
scarcely visible; no tympanum. Fingers free ; toes free or 
webbed, the tips not dilated; outer metatarsals united. 
No maxillary teeth. Omosternum cartilaginous ; sternum 
with slender bony style ; preecoracoids strongly curved. 
Sacral diapophyses immensely dilated ; urostyle mono- 
condylous. 
All three species possess a pair of mamme-like pectoral 
glands, in which, together with the vertical pupil, absence of 
teeth, pectoral and pelvic characters, the genus resembles 
Ophryophryne. The latter genus may, however, be readily 
distinguished by its well-developed tympanum and pug-like 
physiognomy. 
Key to Species. 
I. Choanze very small; toes free ....... Ratevere siebea « eeteat stkkimensis. 
II. Choanz moderate. 
a, Abdomen smooth ; toes free or nearly free ........ mammata, 
6. Abdomen granular; toes  webbed................ alticola, 
At the present time there are, therefore, two allied genera 
connecting Bufonide and Pelobatide, but regarded until 
recently as belonging to the former family on account of the 
absence of teeth. These are Cophophryne, Blgr., and Ophryo- 
phryne, Blgr. In 1919 Mr. Boulenger (in describing 
Aelurophryne) remarks :—‘ As I am more and more losing 
faith in the importance of the presence or absence of teeth as 
a family character, I would suggest an alteration of the 
definition of Pelobatidze so as to include these toothless 
forms. Although the definition will then be very vague 
indeed, the group will at least be expressive of the natural 
affinities of its constituents, which may be described as lowly 
forms approaching the Discoglosside, and leading, on the 
one hand, to the Cystignathide (through Batrachopsis) and, 
on the other, to the Butonidee.” 
As long as Pelobatidee is maintained as distinct from 
Bufonidee, this must certainly be the case, for the strongly 
curved precoracoids, monocondylous urostyle, and enormously 
dilated sacral diapophyses place these genera mueh nearer to 
Pelobates* and Megalophrys than to Bufo, especially so 
since the presence or absence of teeth can no longer be relied 
upon as a family character. 
This being accepted, however, there is no longer a cha- 
racter, or combination of characters, by which one may 
separate these hitherto distinct families. For instance, as 
* The larval stage also bears this out, for the tadpole of C. sikkimensis 
resembles that of Pelobates in a very marked degree, 
