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THE MAMMALS OE EGYPT. 
the process of the premaxilla narrows posteriorly before joining the frontal; the outer 
wall of the infraorbital foramen is broad and inflated. 
In IL afric(E-australis,VQiexs, from South Africa, the nasals are shorter than in either 
of the foregoing forms; otherwise the skull nearly resembles that of H. senegalica, 
H. galeata, Thomas, is by far the largest of all the Crested Porcupines. It was first 
described from British East. Africa, but Mr. A. E. Pease has lately found it in the Hawash 
Valley in Abyssinia. It difiers from all other species in having a longer palate, the 
posterior narial opening being level with the back of the last molars, whereas in all the 
others the palate ends on a level with the back of the second molars. The premaxilla 
sends up a broad process to meet the frontal, the suture is placed about equidistant 
from the anterior and posterior extremities of the huge, dome-like nasals. The maxilla 
is very broad and greatly inflated in the outer wall of the infraorbital foramen. 
Hystrix indica, Gray, ditfers greatly in the form of its skull from any species found 
on the African continent. It ranges as flir west as Aden, and is there very plentiful. 
The skull is narrow and flat, the nasals are truncated posteriorly and only extend 
slightly further back than the junction of the premaxillm and frontals. The pre¬ 
maxillary process is extraordinarily broad and actually embraces the lachrymal. The 
maxilla in front of the orbit is narrow, thin, and solid. —W. E. de W. 
