LOWER MAMMAf. OALLEKY, 
61 
(Hg. 34), and Aard-vark. The marine Sirenians, as represented 
by the Dugong and Manati, are shown in the Geological 
Department. In the third bay are the Pigs and Hippopota- 
muses ; in the fourth the Camels, and near by the Chevrotains, 
or Mouse-Deer. Following on are the Deer, many of which, as RuminaTits, 
already stated, are placed in the middle line of the gallery. 
Properly speaking, the Giraffes and their recent and extinct 
allies, the former represented by the Okapi of Central Africa 
Fig. 'Sr>. — Male Pkongbuck (AntUocapra anier/cana) 
(fig. 13, p. 35), should come in here. But, as already mentioned, 
it has been found convenient to remove all the members 
of the Giraffe group into the east corridor. In the adjacent 
wall-case stands the Prongbuck (AntUocapra) (fig. 35), the sole 
representative of a family characterised by the circumstance 
that the horns have hollow sheaths, which are branched and 
ished annually. Next in order come the Antelopes, a large 
number of whicli iire placed in tlic c^nrridors outside the 
