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Show 432 MR. OLDFIELB THOMAS ON [May 4, buffy yellow, clearer on sides. Belly white, the bases of the hairs slaty. Ears larger and rounded. Upper surface of hands and feet whitish. Tail long, thinly haired, coarsely scaled (10 to the cm.), brown above, rather paler below. Skull short and broad, with a large rounded brain-case. Muzzle broad and flat. Supraorbital ridges delicate, widely divergent behind. Palatal foramina very long, reaching to the middle of m.1. Posterior palate reaching more than 1 m m . behind m.1. Incisors narrow, very pale-coloured, nearly or quite white near their tips. Molars broad and rounded, their cusps well defined. Dimensions of the type, in skin:- Head and body 157 m m . ; tail 151; hind foot 27 ; ear 18. Skull-basilar length 30 ; greatest breadth 19; nasals 14x4-4; interorbital breadth 5*2; interparietal 9 x 3-4 ; palate-length from henselion 18; diastema 10*1; palatal foramina 10x2-1; length of upper molar series 6*7. Hab. Nyika plateau. GEORYCHUS WHTTEI, sp. n. Similar in size, character and colour of fur, and other external characters to 67. nlmrodl, D e Wint., more silvery buff than 67. hottentottus. N o trace of a white frontal spot. Skull heavy, particularly broad across the interorbital region, and with strong, very widely expanded zygomata. Nasals narrow in front, rapidly broadening to their middle, and then evenly narrowing again to a point posteriorly. Ascending processes of preniaxillae considerably surpassing nasals, unusually broad posteriorly, 3 m m. broad at tbe fronto-maxillary suture, and tending in old age to unite behind the nasals. Anteorbital foramen-high. Other cranial characters much as in 67. hottentottus. Dimensions of type ( $ ), in skin :- Head and body (stretched) 177 mm., hind foot (c.) 22. Skull-basilar length 32-6; greatest breadth 30; nasals 13-2x4; interorbital breadth 11-2; palate-length from henselion 23-2; diastema 14. Hab. Karonga, Lake Nyasa (A. Whyte, July 1896). A Mole-rat, apparently of the same species, was also found up to the extreme top of the Nyika plateau. THRTONOMTS X SCLATERI, sp. n. Most nearly related to T. gregorlanus, Thos., of which the external characters have not as yet been described. General colour very much as in T. swlnderenlanus, but the pelage, though more hispid than ordinary fur, is much softer and more flaccid than in the common form. Tail nearly twice the length of the hind foot. Posterior belly and axillary region whitish. Skull rather smaller than the typical skull of T. gregorlanus, although decidedly older. Nasals parallel-sided. Frontal pre- 1 Attention may Fwiatsz .p r(e1o8c67c)u,p isehdo ublyd Ebssetc abngsdaci hfnoo lrdz rt (ha1iw8sn2 3g)et,no u astn.hde tfhaecrte ftohraet t Ahuatl atchoed nuas,m eT Tehmrmy.o n(o1m8y2s7,), |