| OCR Text |
Show 252 MR. ST. GEORGE MIVART ON INDRIS DIADEMA. [Mai*. 14, Fig. 3. Front view of skull. Scale, nat. size. The skull.-De Blainville remarks* of the skull of this species, of which he had only a very immature specimen,-"Tout ce que je puis en dire, c'est qu'elle a la plus grande ressemblance avec une de pareil age environ, provenant de YLndri ordinaire ; seulement le museau est notablement plus court, l'espace inter-orbitaire un peu plus large, et l'os incisif plus developpe." The facial part is indeed very decidedly shorter than in 7. brevicaudatus, though it is longer than in 7. laniger; and the anteroposterior extent of the anterior opening of the orbit falls short of the length of the muzzle in front of it, though by no means so decidedly so as in the former species. As in 7. laniger, the skull, when viewed from above, is seen to be broadest between the outer margins of the orbits; while the greatest width of the cranium proper is in a transverse line passing just behind the posterior ends of the zygomatic arches. The mastoidal region, as in the other Lndrisince, is not inflated, but the prominence just above the aperture of the external auditory meatus, which is so marked in 7. laniger, is represented by only a very slight enlargement in the species now described. The skull is not concave externally, either between the orbits or elsewhere on its roof; but there is a flattening in the former situation, which may become a concavity with age, as this region in 7. brevicaudatus thus alters with time. The same may be said with regard to the development of temporal ridges, which are not indicated in the skull examined. There is no interparietal. The nasals are rather strongly convex, and become slightly narrower transversely towards their upper ends. They are shut out from the lachrymals by a tolerably broad process of the maxilla, * Loc. cit. p. 23. |
