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Bulletin American Museum of Natural History. [Vol. XXVII, 



Hairs. In Ptilocercus as in Macroscelides the hairs on the tail are grouped 

 in threes behind the scales (Weber, 1904, p. 363) a very primitive mamma- 

 lian character (see p. 140), while in Ptilocercus the proximal part of the tail 

 is scaly (Beddard, 1902). 



Ccecum. Peters observed that Macroscelides and its allies, unlike other 

 Insectivores have a caecum and Hseckel therefore applied the name " Meno- 



Fig. 20. A., Palmar surface of the manus, B., plantar surface of the pes of Tupaia sp. 

 Arboreal adaptations shown in the divergent pollex and hallux, strong claws and arrange- 

 ment of palmar and plantar pads. X f. 

 i.d^., i.d^., id?, i.d*., interdigital pads. 

 then., thenar pad. 

 hy.thn., hypothenar pad. 

 prx.in., internal proximal pad. 

 prx.e., external proximal pad. 



typhla " to the group including the Tupaiidfe and Macroscelididse. But 

 Flower, Beddard and Cluipman, (1904) state that at least in Tupaia tana 

 the cpecum is wanting, although a minute caecum is retained in T. belangeri 

 (Beddard, 1902, ]). 511). 



SublingKa. The sublingua of Tupaia is stated to be like that of the 

 Lemuroid Chiromijs (Garrod, quoted by Beddard, 1902). 



