594 MR. SCLATER ON TWO SPECIES OF MAMMALS. [Nov. 25, 
Natterer’s Hapale chrysoleucos. This skin, which I now exhibit, 
agrees, it will be observed, in every respect very closely with the 
original of Dr. Gray’s Mico sericeus, also now before us, which 
died in the Gardens on the 21st of July last; so that there can be 
no doubt of their identity. 
The synonymy of this species will therefore stand as follows :— 
HApALr CHRYSOLEUCOS. 
Hapale chrysoleucos, Wagner, Wiegm. Arch. 1842, i. p. 357 ; 
Saiugeth. Suppl. v. p. 125. 
Midas argentatus, Bates, Nat. on the Amazons, i. p. 162(?). 
Mico sericeus, Gray, P. Z. 8. 1868, p. 256, t. xxiv. 
Hapale argentata, Sclater, P. Z.S. 1868, p. 262. 
Hab. Vicinity of Borba, Rio Madeira (Natterer). 
This species of Hapale is very well marked, from its peculiar 
pale uniform colour, in which it resembles H. argentata and H. 
melanura. From these, however, as already remarked, it may be 
distinguished by its hairy ears. 
Herr v. Pelzeln has most kindly informed me that Natterer col- 
lected seven examples of this species of Hapale at Borba, on the 
Rio Madeira, and in its vicinity, 1829 and 1830. Four of these are 
still in the Vienna Museum, and one in that of Berlin. 
Unless Mr. Bates is im error in his identification of the Hapale 
observed near Cameta with the animal lately living in our Gardens, 
the range of this species must extend from the Rio Madeira along 
the southern bank of the Amazons to the Rio Tocantins, which is 
by no means unlikely, other species being common to these two 
localities. 
2. CEPHALOPHUS BREVICEPS, Gray, P. Z. S. 1866, p. 202. 
oe On the 13th of February, 1866, we purchased of a dealer at 
Liverpool a very young female Antelope, of the genus Cephalophus, 
stated to have been received in a vessel coming from Western 
Africa. Shortly afterwards, Dr. Gray, having had his attention 
called to this animal by the Superintendent whilst visiting the 
Gardens, described and figured it in our ‘Proceedings’ (1866, 
p- 202, plate xx.) as a new species, under the name Cephalophus 
breviceps. Upon the animal attaining maturity about a year after- 
wards the colour of the fur became darker and more intense, and 
it was evident that the supposed new species was nothing more 
than the young of the Bay Antelope (Cephalophus dorsalis sive 
badius), which had been previously living in the Society’s Gardens, 
as well as in the former Surrey Zoological Gardens, and in the 
Menagerie of the late Earl of Derby, at Knowsley. 
The history of this species, as far as I can make it out, appears 
to be as follows :— 
In 1846 Dr. Gray first established Cephalophus dorsalis as a new 
species of the genus *, basing his description on a specimen in the 
* Ann. Nat. Hist. xviii. p. 164, 
