“The common Dorcas Gazelle is to be met with throughout the greater part of Central and Southern Tunisia, frequenting the vast semi-desert plains abundant in those districts, but not the more sandy inland country of the extreme south of the Regency, where it is replaced by another species. So far as I can ascertain, the Dorcas Gazelle never occurs in the Tell country; but I have observed it in the neighbourhood of Kairouan, which is probably the extreme northern limit of the range of this species in the Regency. On the extensive plains to the west of Gafsa I have found it particularly abundant; and I understand it is plentiful in the neighbourhood of the Chott Djerid, and throughout a considerable portion of the coast-country of the south, but not in the true desert further inland, where sand-dunes take the place of the stony scrub-covered plains. It may occasionally stray into the sand country, but this is exceptional. “In winter the Dorcas Gazelle congregates in large herds, often numbering over one hundred individuals; but in spring these herds break up, and one then meets with the Gazelles in small parties or singly. The female _G. dorcas_, I am told, gives birth to but one young one at a time, and this generally in the month of April. “The horns of this species vary considerably both in size and in shape. As a rule, those of the adult male are stout, deeply annulate, and lyrate, measuring from 10 to 13 inches in length along the front curve; those of the female are much shorter, straighter, smoother, and more slender. “I may here mention that I have specimens of the Dorcas Gazelle from the country south of the Chott Djerid, which are somewhat paler in colour than the ordinary form. No doubt this variation in colouring is due to some difference in the nature of the soil and surroundings of the districts from whence these particular specimens came.” So little is known of the natural history of Tripoli and Barca that we can only presume that the Dorcas Gazelle ranges through these countries on its way to Egypt, where it is well known to be abundant in the Western Desert. Sclater examined large numbers of both sexes of this species in the Zoological Garden of Gizeh near Cairo in 1895 from this locality[8], and several specimens from the same source have been received in exchange by the Zoological Society of London. Our figures of both sexes of the Dorcas Gazelle (Plate LVII.) have been prepared by Mr. Smit from examples thus obtained.