NO. me. TReESHR E^VS: FAMILY TVPAHD^-LYOH. 13 



in other mammalian groups. The youngest skulls that I have 

 examined have always shown the complete milk dentition but some- 

 times the last milk premolar ha, not been entnely m place. The 



adult dentition is : 



71 /2_(7i_p2 p3 pi ji/i j/2 3p 



The youngest dentition seen is: ♦ 



DP DP ^ DC DP' DP' 



-DT^m^DTTDcrDPTDPl 



The next teeth to appear are g^, followed by M,, then M\ then 

 M M' M M\ All the permanent molars are in place before the 

 milk teeth 'are shed. The first of those permanent teeth having 

 predecessors to appear in the majority of cases is ^, the upper and 

 lower seemmg to come in about the same time, jr appear at nearly the 

 same time as ^, sometimes just before. ^^ are the last of the per- 

 manent premolars to come in, appearing just after p^^. The 

 canines appear at or about the same time as ^^or just a little later, 

 arriving with y. Of the incisors the lower appear slightly before 

 the upper. /, appears about the same time as P, and before P, 

 andlus't afte;/3''7. comes m just after 7. and 73. P comes m a ter 

 all the permanent upper premolars and camnes are m place and is 

 followed by I\ which is thus the last of the permanent teeth to be m 

 place. By the time the last permanent tooth is in place the molars 

 almost always show slight traces of wear. , -u a a 



The teeth of Tupaiid^ in whole or part have been described and 

 figured by Horsfield/ Cuvier,^ Huschke,^ Owen,^ Giebel,^ and Gregory. 



VISCERAL ANATOMY. 

 The visceral anatomy of Tupaiidse has been examined by A. H. 

 Garrod in 1875/ based primarily on an exammation oi Tupam 

 helangeri which had just died after living in the S^^^ens of the Lon- 

 don Zoological Society nearly two years, supplemented by an exami- 

 nation of Tupaia splendidula and Tana tana from specimens preserved 



1 zool Res. Java, unnumbered plate ( Tupaia, Tana), 1824. 



i Dents des Mammiferes, 1825, p. GO ( Tupaia, Tana). 



» Isis vol. 20, 1827, pp. 758-759, pi- 10. 



« Odontoeraphy vol. 1, p. 419; vol. 2, pi. Ill, fig. 3, 1840-1845 ( Tana). 



4 Odontograpny, vol. 1, p , 15_18, copied from Horsfield and Owen. 



:r*»rM;fNLf. His!:: vi s m., pp. ^i ^n. n.. n.^^ t.,.,.. p.,«^). ■ 



» Proc. Zool. Soc. London, 1879, pp. 301-305, figs. 1-3, brain. 



