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Show 256 PROF. ALLMAN ON POTAMOGALE VELOX. [Mai*. 14, extent of tbe orbit about equal to the length of the muzzle in of that opening; a very slight protuberance above the external auditory meatus ; no process of the malar projecting above the anterior end of the zygomatic process of the squamosal; floor of orbit not much above the upper alveolar margin ; all posterior palatine foramina moderate; mandibular symphysis not much less than three times the length of the lower incisors; fossa for digastric very deep ; posterior part of articular surface of condyle very much flattened; angle much bent downwards, making inferior margin of mandible decidedly concave. Hab. Madagascar. INDRIS LANIGER. Characters.-Ears very small and hidden in the fur; muzzle very short indeed ; fur woolly : supinator ridge of humerus very large ; posterior pair of upper incisors considerably larger than the anterior pair ; upper canine (sometimes at least) scarcely exceeding first premolar in vertical extent; skull strongly concave between the orbits; antero-posterior extent of the anterior opening of the orbit exceeding the length of the muzzle in front of that opening; a marked protuberance above the external auditory meatus; an obtuse process projecting from the malar over the anterior end of the zygomatic process of the squamosal; floor of orbit very little above the upper alveolar margin; no large palatine foramen behind the last molar; palate with its posterior margin not thickened ; anterior palatine foramina very large ; mandibular symphysis nearly three times the length of the lower incisors ; fossa for digastric very deep indeed ; a vertical groove on posterior part of articular surface of condyle; inferior margin of mandible only slightly concave. Hab. Madagascar and St. Mary's Island. EXPLANATION OF PLATE XVIII. Fig. 1. Upper surface of the skull of Indris diadema. 2. Under surface of the same. 3. Side view of the same. 4. Side view of the outside of the mandible of I. diadema. 5. Grinding-surface of the right dental series of the same. (All the figures are of the natural size.) 2. Supplementary Note on Potamogale velox. By Prof. A L L M A N , F.R.S., Corr. M e m b . Zool. Soc. Mr. St. George Mivart having recently expressed a wish to inspect the skull of the Potamogale velox, described by me at a former Meeting of the Society*, I had much pleasure in placing it at his disposal. Shortly afterwards I received from him a note reminding me of the discrepancy between the number of teeth in the dental * Trans. Zool. Soc. vi. pt. 1, June 1863. |