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Show 1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 6[) late; preemaxilla very small ; suboptic foramen conspicuous; infraorbital canal very long, the lachrymal foramen opening in front of its posterior termination ; angle of mandible very short; canine very much larger than the incisor, and with two roots; third lower molar considerably smaller than the first or second one. Eight lumbar vertebrae ; cervical spines pretty well developed ; ulna complete ; only four digits to either manus or pes. Hab. Eastern Africa. TUPAID^E. I i q q I. 3^3, C. J^J, M . g^. Skull broadest between the posterior roots of the zygomata, which are complete and slender; orbits enclosed by bone or at least a postorbital process ; dorsum of muzzle convex transversely ; a tympanic bulla; an external alisphenoid canal; molar perforated; carotid and postglenoid foramina, but no suboptic foramen ; foramen ovale a narrow aperture widely separated from the spheno-orbital opening ; lachrymal foramen at margin of orbit or rather without it; coronoid process of mandible rising much above condyle; canine not close to premaxillary suture; upper molars with four more or less marked principal cusps and an external cingulum, which tends to form, with the two outer principal cusps, two triangular prisms. Thirteen dorsal, five to seven lumbar vertebrae; lumbar transverse processes not much antero-posteriorly extended ; well-developed hyperapophyses ; no hypapophyses ; scapula with only a rudimentary metacromion ; clavicles slender ; a scapho-lunar bone and os intermedium ; pelvic symphysis elongated; tibia and fibula distinct *; metatarsus but very little longer than the tarsus ; five digits to each extremity ; a caecum. Hab. South-eastern Asia and the Indian archipelago. TUPAIA t, Raffles. Dentition: I. ^3, C. ~i> P-M. 3^, M. §^. Skull much narrowed anteriorly; zygoma very slender; orbits large and completely encircled by bone; anterior margin of orbit sharply prominent ; a process above the lachrymal foramen ; temporal fossa verv small; posterior margin of palate not thickened ; small defects of ossification in palate; pterygoid fossa very small, and distant from palate; no paroccipital process; postglenoid process rudimentary ; molar with a large perforation; foramen rotundum distinct from spheno-orbital fissure; a supraorbital foramen; infraorbital canal long and narrow; posterior palatine foramen large ; cingulum of upper molars developing cusps ; triangular prisms * I presume that Ptilocercus and Hylomys agree witb Tupaia in this cha-r- icfjGi* f Horsfield's ' Zool. Researches,' 1824, 3 plates; Raffles, Linn. Trans, xiii. p. 257; Miiller und Schlegel, Verhandl. 1839-1844; De Blainville, ' Insec-tivores,' pis. iii., vi., & x.; F. Cuvier's ' Dents des Mammiferes,' no. xvii.; Owen's ' Odontography,' pl. cxi. fig. 3 ; Wagner, Schreb. Supplem. ii. p. 37, v. p. 525. |