1871.] MR. ST. GEORGE MIVART ON HEMICENTETES. 6 l J 



late; praemaxilla very small ; suboptic foramen conspicuous ; infra- 

 orbital 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 ver- 

 tebrae ; cervical spines pretty well developed ; ulna complete ; only 

 four digits to either manus or pes. 

 Hab. Eastern Africa. 



TuPAIDiE. 



!• s^3' C" 1=1' M # l=3' 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 sepa- 

 rated 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 prem axillary suture ; 

 upper molars with four more or less marked principal cusps and an 

 external cingulum, which tends to form, with the two outer prin- 

 cipal cusps, two triangular prisms. Thirteen dorsal, five to seven 

 lumbar vertebrae ; lumbar transverse processes not much antero- 

 posteriorly extended ; well-developed hyperapophyses ; no hypapo- 

 physes ; 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 cascum. 



Hab. South-eastern Asia and the Indian archipelago. 



TuPAiAt, Raffles. 



Dentition: I. jg, C. g, P.M. gj, M. g. Skull much nar- 

 rowed anteriorly; zygoma very slender; orbits large and com- 

 pletely encircled by bone ; anterior margin of orbit sharply pro- 

 minent ; a process above the lachrymal foramen ; temporal fossa 

 very 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 rudi- 

 mentary ; molar with a large perforation ; foramen rotundum di- 

 stinct from spheno-orbital fissure ; a supraorbital foramen ; infra- 

 orbital canal long and narrow ; posterior palatine foramen large ; 

 cingulum of upper molars developing cusps ; triangular prisms 



* I presume that Ptilocercus and Ilylomys agree with Tupaia in this cha- 

 racter. 



t Horsfield's ' Zool. Researches,' 1824, 3 plates; Raffles, Linn. Trans, xiii. 

 p. 257; Mailer unci Schlegel, Verhandl. 1839-1844; De Blainville, ' Insec- 

 tivores,' pis. hi., vi., & x. ; P. C'uvier's 'Dents des Mammiferes,' no. xvii. ; 

 Owen's ' Odontography,' pi. cxi. fig. 3 ; Wagner, Schreb. Supplem. ii. p. 37, v. 

 p. 525. 



