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Show 498 MR. ST. G. MIVART ON THE LEMURS. [May 20, INDRISIN/E. INDRIS. I. f, C. ±, Pm. }, M. f ={=30. Characters.-Ears short; muzzle long, moderate, or rather or very short; hind limbs much longer than the fore limbs ; index very short, m u c h shorter than fifth digit; pollex short and placed far back ; hallux very long and covered with hair ; tail long, moderate, or very short; internal condyle of humerus perforated ; carpus with or without an os intermedium ; tarsus short; naviculare very short; sixth cervical spine long; cervical neural laminae medianly notched posteriorly; neural lamina of seventh cervical vertebra shortest after that of the atlas ; median hypapophysial ridges developed beneath the second to fifth cervical vertebrae ; eight lumbar vertebrae ; lumbar spinous processes subquadrate, and nearly or quite vertical ; transverse diameter of thorax exceeding its depth ; dorsal region of spine relatively short; cartilages of ribs slightly expanding before reaching the sternum ; no hyperapophyses ; first upper molar with four principal cusps, and from two to four supplementary cusps ; last upper molar with only two well-developed cusps ; the lower incisor with its outer surface longitudinally grooved ; posterior lower premolar much antero-posteriorly extended; first Fig. 11. Dorsal aspect of left tarsus of Indris diadema. a, astragalus; c, os calcis; n, naviculare; e, ento-cuneiforme; m, meso-cunei-forme; t, ecto-cuneiforme; d, cuboid. lower molar with five more or less distinct cusps; last lower molar quinquecuspid ; a paramastoid process ; no interparietal; lachrymal foramen very near orbit; a process depending from zygoma inTront of, and external to, the glenoid surface ; a glenoid foramen ; anterior palatine foramina very large ; mandibular symphysis very long; condyle rounded, but very little transversely extended; articular |