617 
Birds of Southern Cameroon. 
first were adult males with large testes. Bitye and Assobam. 
Plumage of E. schistaceus. The above numbers are arranged 
so as to begin with a specimen that is ringed w r ith green 
above and with yellow below, and end with one that is clear 
slaty-grey above and white below ; the intermediate numbers 
represent all gradations between the two ; but the difference 
in the whole series is slight. 
Nos. 3245 ?, 4198 J, 3913 ?, 4488 3601 sex?, 
3301 £, 4021 $, 3628 sex ? All immature. Bitye and 
Assobam. Plumage of E. olivaceus. In the first the under 
side is pale brownish-yellow and the upper side olivaceous ; 
Text-fig. 20. 
ABC 
A. Tongue of young Euprinodes rufogularis, see p. 616. B. Tongue 
of nearly adult Euprinodes rufogularis , see p. 616. C. Tongue of 
young Apalis binotata, see p. 618. 
and in the last three the under side is nearly white and 
the upper side nearly grey. All intermediate gradations are 
represented in the numbers between. 
No. 3343. ? adult. Assobam. (Similar $ specimens 
were previously collected at Bitye.) Plumage of typical 
rufogularis. 
Immature birds similar to those mentioned above have 
been identified by Dr. Sharpe as E. olivaceus , and that 
species has been united by him with E. rufogularis. I have 
now to unite with it also E. schistaceus , which represents 
the male in adult plumage. This is done not, ouly 
