1903.] OF THE PERCY SLADEN EXPEDITION. ^*^ 



size of examples from Para, while those from South Brazil aTid 

 MattoGrosso agree with Paraguayan specimens - -^-^^^^^^^^^^ 

 dimension about 105 mm. D. sexcmc^«s will therefore ^tand i°i 

 thT K Brazilian form, and D. gilvipes, based on Azaras Tatou 

 poyou, for the large southern one. 



34. Tatu novemcinctus L. 



c?". 1032, 1040, 1079, 1102, ll33, 1148. 

 $. 1039, 1202. 



35. Tatu megalolepis Cope. 



■ As' a topotype of Cope's species, hitherto unrepresented in the 

 Miteum collection, this Armadillo forms a valuable accession. 

 The species is perhaps not so widely separated from r.<|^.m_ 

 M^s as its describer supposed, for this specimen has 4o-47 

 Tcales in the movable bands, and the Museum contains examples 

 Tsep^Jainctus from Bio Grande do Sul -f J -^^.f ^ -//ts 

 the gap between the two, stated by Cope to be from 43 to 57, is 

 thereby considerably reduced. -,, ^. 4.1 „n^,. 



In size T. megalolepis is decidedly smaller than the older 

 known species, the skull of Mr. Robert's example being only 

 63 mm. in length. 



36. DiDELPHis PARAGUAYENSis Oken. 

 S. 998. 



Practically topotypes of Wagner's B. pcecdoUs, which was 

 collected at Cuyabd. 



37 Marmosa constanti^, sp. n. 



^" 1110. 27 August, 1902. Type. (B.M. No. 3.7.7.157 ) 



Size rather larger than in if. cinerea. Fur close and fine 

 shorter and less woolly than in M. cmerea- hairs of back about 

 f mm in length. General colour above paler than iisual m this 

 LZ' nearly^matching Ridgway's "Isabella," or slightly greyei-^ 

 On the side^s the colour gradually becomes more buffy passing 

 ?radiSly into the "buff-yellow" of the under surface, the chin, 

 W r Jnt?e of belly inner side of limbs, and mgumal region 

 Wg aTof t\is latteJcolour. On the sides of the belly t^ie hairs 



1 Ltv at base but on the rest of the under surface they are 

 tSlot t'o fheh root? Face pale buffy grey ; black orbital rings 

 present but narrow, ill-defined, and not prolonged forwards on 

 to the sides of the n^se. Cheeks to base of ear dull buffy yellow 

 ^nvrwe naked, greyish brown. Outer side of fore and hind 

 SsS buffy isabelll, like the sides. Tail rather shorter than 

 us^al in this group, its basal furry portion about l^ inches m 

 length, brownisli isLbella above, yeUowish below ; naked portion 

 about iialf brown and half white, the junction of the two colouis 

 mottled and irregular. ^^^ 



