Transactions of the Linnean Society. 581 



goats, and similar animals. Dr. Smith describes the species at 

 considerable length, and enters into much curious and interesting 

 detail relative to the habits of an individual which he kept during 

 a long period in confinement. The new species of Hyrax is 

 rather larger than the //. Capensis. It is found in many of the 

 forests of South Africa, and is occasionally seen coming out of 

 holes of decayed trees, or standing upon the summits of such as 

 have only trunks remaining. 



The " Remarks on the Aniilope Chickara : by Robert Hills, 

 Esq., F.L.S.," give various particulars relative to a young animal 

 of this species, the first living specimen of a four-horned Anti- 

 lope ever brought to this country. The dimensions are given 

 and the colour is described, as are also the horns, a point the 

 more important, on account of the lower pair having been im- 

 perfect or injured in the specimens which fell under the observa- 

 tion of General Hardwicke and M. Duvaucel. A peculiarity is 

 pointed out by Mr. Hills in the apex and alse of the nose not 

 being neatly distinguished from the hair-clad parts that sur- 

 round them, the hairy covering becoming gradually shorter and 

 shorter, without any distinct line of separation between it and the 

 smooth parts. The figures of the animal, and of the head, which 

 accompany the communication, are beautifully executed. 



In his " Observations on the Tracheae of Birds ; with Descrip- 

 tions and Representations of several not hitherto figured ; by Wm. 

 Yarrell, Esq., F.L.S.," the authour chiefly directs himself to the 

 illustration of five species. The whole of these are remarkable, 

 and well merit the attention which has been bestowed upon them, 

 but the combinations of structure exhibited in the first and in the 

 last of them, are perhaps the most extraordinary. In the Numida 

 cristata, Pall., that part of the furculum which descends from the 

 junction of its branches, instead of being flat as in the common 

 Guinea fowl, is found to be double, each branch appearing to ex- 

 tend on the side, so as to form with the corresponding expansion 

 of the opposite one, an almost circular socket or pouch, into which 

 the trachea descends, and after forming within it a circular sweep, 

 ascends upwards and forwards to the projecting anterior part of 



