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Show 1875.J DR. A. GTJNTHER ON A NEW MOLE. 311 common among weeds in the littoral and laminarian zones in Shetland. EXPLANATION OF THE PLATES. PLATE XLI. Fig. 1. Cheyletus robertsoni, seen from below. 2. Ditto, palp. 1 3. Ditto, extremity of first foot. I More highly magnified. 4. Ditto, extremity of third foot. J 5. Gamasus marinus, seen from below. 6. Ditto, mouth-organs, more highly magnified : a, mandfble ; b, styliform appendage; c, palp. 7. Ditto, extremity of foot. PLATE XLII. Fig. 1. Pachygnathus sculptus, seen from below. 2. Ditto, seen from side. 3. Ditto, body seen from above. 4. Ditto, mandibles. 5. Ditto, palp. I More highly magnified. 6. Ditto, extremity of foot. I 7. Raphignathus falcatus, seen from above: a, palp; c, mandibular sheath. 8. Ditto: a, palp ; b, protrusile mandible ; c, mandibular * sheath. More highly 9. Ditto, protrusile mandible. j" magnified. 10. Extremity of foot. 5. Description of a new Species of Chrysochloris from South Africa. By Dr. A L B E R T GHJNTHERJ V.P.Z.S. [Eeceived April 3, 1875.] (Plate XLIII.) Mr. Herbert Trevelyan has presented to the Trustees of the British Museum the skin of a new species of Chrysochloris, which is distinguished by its gigantic size, being nearly double the size of any of the other species known. He obtained it from a Kaffir who accompanied a shooting-party in the Pirie Forest near King William's town (British Caffraria), and believes that it must be very scarce or local, as none of his companions had ever seen another specimen. Unfortunately the skull has not been preserved; otherwise the skin is in a most perfect condition. I name this species after its discoverer, and characterize it as follows :- CHRYSOCHLORIS TREVELYANI. Nine and a half inches long. The colour and quality of the fur reminds one of that of an Otter; it is moderately long, rather stiff, and of a deep chocolate-brown colour, with a dense whitish underfur. Margin of the lips white. On the abdomen the fur is less dense and shorter ; and patches of the whitish under-fur are visible in the posterior parts of the abdomen. Muffle flat, projecting as in the other species, but comparatively narrower. Claws whitish ; the inner and |