NO. 1976. 



TREESHREWS: FAMILY TUPAIIDjE—LYON. 



105 



and base of tail, blackish brown, not contrasting with the light area 

 of the pelage so noticeably as in the typical subspecies; top of head 

 light blackish brown, this color spreading down to behind ears, and 

 usually posteriorly as an indistinct lateral stripe, to meet dark area 

 of back; in many specimens an indistinct median streak extending 

 from top of head to dark area of back. 



Slcull and teeth. — These do not differ from those of Tupaia nico- 

 harica nicolarica. (Plate 10, fig. 7.) 



Measurements. — Type: Head and body, 190 mm.; tail, 220; hind 

 foot, 48; condylo-basal length, 49.5; zygomatic width, 28.5; width of 

 brain case, 20; maxillary tooth row, 19. The measurements of the 

 type are shghtly in excess of the usual measurements. See table 

 below. 



Remarlcs. — Tupaia nicobarica surda is not a highly differentiated 

 form, but it is quite as distinct as some of the insular forms of Tupaia 

 glis to which binomial names have been given. The present form is 

 a member of such a distinct species group of which there are only 

 two members so closely related geographically, it would seem a matter 

 of convenience to employ trinomial names even though the two forms 

 were more highly differentiated than they are. As noticed in the 

 original description there are a few specimens in each series of the two 

 subspecies which can not be distinguished with certainty one from 

 the other. 



Specimens examined. — Sixteen. 



Measurements of Tupaia nicobarica surda. 



Locality. 



Number. 



Molar teeth 

 worn. 



Nicobar Islands, Little 

 Nicobar. 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



111749.. 



111750.. 

 111752.. 

 111753.. 

 111756.. 

 111759.. 

 111760. . 

 111761.. 

 1117571- 

 111751.. 

 111754.. 

 ni755.. 

 111758.. 

 111762.. 

 111763.. 

 1117856. 



Male... 



..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 Female 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 

 ..do.... 



Moderately 



Slightly.... 



do.i.... 



None 2 



do. 2.... 



do. 3.... 



Slightly 2... 

 Moderately 

 Slightly.... 



None 5 



Moderately 



do 



Slightly.... 

 Moderately 



Much 



C) 



1-1 

 1-1 

 1-1 

 1-1 

 1-1 

 1-1 



1 (fji, di 2 still in place, ci not at fuU development. 



2 c! just appearing, di ', di", and dc still in place. 



3 di'i still in place, i ' appearing, di^ shed, j2 nearly in place. 



* Type. 



6 m 3 just appearing. * 



* Preserved in alcohol. 



* Adult, pregnant, uterus 3u mm. long. 



