86 
former being, as a rule, longer and stouter than those of the latter. The horns vary 
somewhat in the amount of spiral twist, probably according to age, as will be seen by 
two specimens of which the following are the measurements :— 
inches. inches. 
“* Length along fronticuryess ese B45 335 
Do; im straight line eee eee 27 27 
Circumference at base .................. 64 64 
Tip ‘to"tip), 24.022 eee eee V7 o lls 
“T also send a photograph of the head of a female Addax, almost adult (see fig. 97, 
p- 85). 
“Since writing the foregoing I have received from South Tunis the complete skin 
and head of a fine male Addax obtained in the early part of this year (1898). The 
horns of this specimen are remarkably long, being in fact quite a record pair, and 
measure as much as 383 inches along the front curves, and 30} inches in a straight line. 
I have presented this specimen to the National Museum at South Kensington.” 
The Addax has likewise been the object of an expedition into the Sahara 
made by Mr. A. E. Pease, M.P., F.Z.S., who, in the Zoological Society’s 
‘ Proceedings’ for 1896, has given us the following account of his adventures 
in search of it:— 
“In February 1895, furnished with all the information I could obtain from 
M. Foureau and natives familiar with the H7g, Sir Edmund Loder and I started from 
Biskra to reach the country between El Oued Souf and Rhadamis. After a week’s 
journey across the desert by way of the great Chotts we reached the Oued Souf. At 
El Oued, the last outpost of the French in the direction of Rhadamis, we were stopped till 
Capitaine de Prandiére had obtained instructions from the General of Division permitting 
us to goon. After a detention, made pleasant by the great kindness and hospitality of 
the three French officers in command of the native garrison, we had the disappointment 
of being told that we could not be allowed to proceed southwards. At the time we 
thought this very hard, for though we were aware that the Touaregs had lately raided 
the Chambas as near as Mey, we felt that a flying visit to the country east of Bir 
Beresof would be without danger, as we could be in and out again before our presence 
was discovered. But a few months later M. Foureau and a strong force were driven 
back from the south, though he had reached a point far beyond our proposed destination, 
and I think our hosts were entirely justified in their refusal. Our plan had been to 
reach Bir Beresof, and then to strike east for Bir Aoueen, where we should in all 
probability have come up with the Addax, which visits this district in large quantities 
in favourable years. The Addax country is the Erg, the great region of sand-dunes, 
covered more or less thickly with vegetation according to situation and rains. This 
sand-dune country covers hundreds—it may be said thousands—of miles and the Addax 
follows the rains. In certain districts it is not uncommon for rain not to fall for several 
