NO. 1976. 



TBEE8HREWS: FAMILY TUPAIID^—LYON. 



23 



Thomas ^ as postaxillary, lateral, and preinguinal. When there are 

 only jiwo pairs of mammae, the preinguinal pau' seems to have disap- 

 peared, and when only one pair is present it would appear to corre- 

 spond with the lateral pair. The number seems to be very constant. 

 The only exceptions to constancy that I have observed are : Twpaia 

 pemangilis, Cat. No. 112499, U.S.N.M., where the mammae are 2-3 = 5, 

 in a group where 2-2 = 4 is normal; T. chinensis, No. 26841, Amer. 

 Mus. Nat. Hist., with 4 mammae instead of 6. Here the postaxillary 

 pair is wanting; both of the remaining pairs are more posteriorly 

 placed than usual, so that the preinguinal pair is really inguinal and 

 the lateral pair almost preinguinal. An alcoholic specimen of Twpaia 

 helangeri in Genoa from Mount Mooleyit, Tenasserim, with only two 

 pairs of mammae, belongs to a group that normally has three pairs. 



Dates of pregnant, and of nursing Tupaias. 



PELAGE. 



There is nothing peculiar in the general characteristics of the 

 pelage of treeshrews.^ It consists of the usual two sorts of hairs, 

 long straight hairs with their terminal ends having colored rings, 

 and softer, shorter, more wooly hairs, also usually having colored 

 rings distally. The basal portions of both kinds of hairs are uniformly 

 some sort of slate color, except in certain species with more or less 

 ochraceous underparts, where all the hairs of the lower parts are uni- 

 formly bright colored throughout. So far as I have been able to 

 ascertain, there is no very distinct seasonal change in pelage, and 



> Ann. Mus. Civ. Stor. Nat. Genova, ser. 2, vol. 10, p. 920, 1890-91. 



»ror remarks on arrangement and size of hairs, see Meijere, Morph. Jahrb., vol. 21, 1894, p. 398. 



