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Show 414 MR. A. D. MICHAEL ON [June 3, in the mountains of that country as far north as 8° N. lat., belongs to E. grevyi, I requested Mr. Hagenbeck to endeavour to obtain for m e a skin of this animal. This he has most kindly done through the intervention of Herr Menges. " It will be seen, I think, that the Mountain Zebra of Somali- Land is Equus grevyi (cf. fig. 1, p. 413), while the Zebra of Masai- Land, as I judge from the flat skin now exhibited (fig. 2, p. 413), obtained in that country by Mr. Joseph Thomson, and kindly sent for exhibition by Col. Grant, would seem to be Equus burchelli, or rather its northern subspecies E. b. chapmani." The following papers were read :- 1. On a Collection of Acarina formed in Algeria. By A. D . M I C H A E L , F.L.S., F.Z.S., F.R.M.S., &c. [Received May 13, 1890.] (Plates XXXVII. & XXXVIII.) This paper shows the results of my endeavours to obtain Acarina during a tour of about two months in Algeria, the time being March and April 1889. The principal fauna of that country is of course well known ; but, as is usually the case in non-European countries, that belonging to the above-named order is practically unknown. Two or three species of Acarina have been recorded by Lucas*, and there have been one or two other notices of the capture of a single species in Algeria or Tunisia ; but this is all, except with regard to the Analgesnce, or bird-parasitic Mites, many of which have been recorded by M . Trouessart from dried specimens found on the bird-skins in the French Museums. The journey was not undertaken for collecting-purposes, but I took with m e a Stephenson binocular microscope and an ordinary dissecting microscope, both arranged to pack in as small a space as could be conveniently arranged, and I made regular use of these instruments, and searched pretty constantly for creatures belonging to m y own specialty during all parts of the tour. The route embraced almost the whole length and a good deal of the breadth of the countrv, and most of the varying conditions of level and climate which it affords. It commenced on the sea-coast at Philippeville, almost at the extreme east, or Tunisian frontier; thence south to Constantine, which is a more high-lying situation, and again southward to the low-level oasis of Biskra in the Sahara, returning to near Constantine, and along the ordinary railway to Setif, whence the coast was again reached at Bougie through the magnificent gorge of the Chabet-el-Akhira; from Bougie I went to Algiers by land. "While at Algiers, in addition to exploring that neighbour- 1 Exploration Scientifique de l'Algerie, &c. Paris, 1849. |