172 Transactions of the Boyal Society of South Africa. 
winding of a watch or by running the finger-nail over the teeth of a conib ; 
the noise of a colony is quite deafening. The vocal sac of the male 
extends from the chin to the breast and is greatly inflated, being probably 
quite four times the size of the head. We have not observed the sexes 
in copula, but breeding males try to grasp each other round the neck, at 
the same time spinning round and round and making a clucking noise. 
The eggs are laid in masses of eight to twenty and are attached to plants. 
The following notes relate to the metamorphosis of larvae kept in a small 
aquarium. Eggs laid on October 24th, the egg being about 1 mm. 
diameter: on the evening of next day tailed larvae about 4 mm. long 
were wriggling inside the capsule : by evening of the 26th they left the 
capsule : 27th, external gills visible, but disappeared during the next 
24 hours : 28th, morning, tiny stump of external gill on left side just 
visible, and same day the beating of the heart was observed : October 
29th, the gut began to acquire a spiral .coil and food was visible therein : 
October 31st, total length 8 mm. : November 4th, 11 mm., the colour 
being light brown above but dark below with golden spots : Novem- 
ber 9th, total length, 15 mm., the hind legs just beginning to 
appear : November 11th, 17 mm. long : November 20th, 27 mm. long, 
the upper surfaces being bright green : November 25th, reached their 
maximum size, 31 mm., and rested at the bottom of the trough for several 
days, the upper surfaces spotted in patches with black and gold : Novem- 
ber 26th, movements of fore-limbs visible, hind-limbs 12 mm. long ; fore- 
limbs, the left one first, thrust out on the 28th : 29th, the tail fin almost 
entirely disappeared, the tail being 19 mm. long : November 30th, the tail 
only 4 mm. long and the body 10 mm., the little frogs left the water and 
took small flies. These young frogs showed very great diversity of colour. 
It should be mentioned that these notes apply only to the most advanced 
individuals of the little colony, for at various stages a number of the tad- 
poles lagged behind for some reason or other. We may note that the 
tadpoles of this frog and of Bana delalandi are often found closely asso- 
ciated together in the same parts of a pool : a dip of the net will at 
any time secure specimens of both species. According to all published 
accounts such an association is an exception. Mr. Boulenger mentions that 
Bana tem^oraria and Bufo vulgaris often breed in the same place, but 
the tadpoles always form distinct colonies (see *' Tailless Batrachians of 
Europe"). 
Family BUFONID^. 
Bufo regularis Eeuss ; B.M. Cat., 298. 
Eldorado (O. A. Kidwell) ; Francistown (E. M. Daniel); Madibi 
(F. B. Parkinson) ; Mafeking (A. H. Walhs) ; Genesa (J. Hill) ; Taungs 
