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Show 1892.] SPECIES OF THE HYRACOIDEA. 73 better proof could be needed of the close external resemblance which P. grayi bears to P. bocagei. But this specimen is of further interest, for while it has the completed orbits of P. grayi, it has the closed coronal sutures ordinarily characteristic of adult P. bocagei; while the type of P. grayi, most kindly lent me for comparison by Prof, du Bocage, has at stage V. the coronal and the parieto-interparietal suture of the right side still open, the left one was closed. This closure at stage V. is very characteristic of P. bocagei; but, had it not been for the second specimen, one might have been doubtful whether the coronal suture was destined to close in P. grayi. While leaving the question still open, however, I may point out that one external character, when observed, will really settle it. If a P. grayi is found with only 0 - 1 = 2 mammae, it will be & Dendrohyrax and a distinct species ; but if, as I expect, it has 1 - 2 = 6 , as in P. brucei, &c, there will be no longer any reason for keeping it separate from P. bocagei1. Both the examples before me are males, and therefore the discovery of its mammary formula must wait until more specimens are collected.] 11. PROCAVIA EMINI. Dendrohyrax emini, Thos., Ann. Mag. N. H. (5) xx. p. 440 (1887), P. Z. S. 1888, p. 15, pi. ii. (animal). Not having received any further examples of this remarkable species, I can only reproduce the salient points of m y original diagnosis, which is based on a young specimen still only at stage I. Fur very long, soft, and fluffy. General colour pale yellowish white, not unlike the belly colour of P. arborea. Hairs above brown for their basal, and pale yellow for their terminal halves. Belly hairs white to their roots. Dorsal spot white, the hairs white throughout. Skull about the same size and shape as that of a P. dorsalis of the same age, markedly narrower and more elongated than that of similarly aged specimens of P. shoana. Orbit not closed posteriorly. Interparietal sutures open. Teeth not distinguishable at this early age from those of P. dorsalis, except that mp1 is decidedly narrower. Breadth of rnp4 5-0 m m ,; height of its crown 4'1 2. Hab. Monbuttu, Central Africa (Dr. Emin Pasha). I am unable to give further particulars about this animal, owing to the want of adult specimens, but an increased knowledge of the group in general only convinces me more of its distinctness from any other species. In one respect it is especially interesting as showing a general relationship to Dendrohyrax, while it has not the one particular cranial character supposed to be distinctive of that group, the completed orbit. 1 The mammary formula of P. bocagei itself is not as yet absolutely known, but I have little doubt that it is the same as that of its close ally P. brucei. 2 By mistake the dimensions of this tooth were given in 1888 as those of m1 ; but the specimen is younger than I then realized, and m} has not yet been developed. |