▁toe ▁on ▁the ▁h ind foot ▁has ▁a ▁cur ved ▁" to ile t - c law " ▁that ▁the ▁animal ▁uses ▁for ▁scratch ing ▁and ▁gro oming , ▁while ▁the ▁other ▁n ails ▁are ▁straight . ▁ ▁In ▁addition ▁to ▁being ▁smaller ▁than ▁the ▁Beng al ▁slow ▁l oris , ▁the ▁sym pat ric ▁S unda ▁slow ▁l oris ▁also ▁diff ers ▁in ▁its ▁color ing : ▁it ▁does ▁not ▁have ▁the ▁pale ▁areas ▁of ▁the ▁head , ▁na pe ▁and ▁shoulders , ▁and ▁its ▁overall ▁color ▁is ▁a ▁ta wn y - ▁or ▁golden - b rown . ▁The ▁pyg my ▁slow ▁l oris ▁( N . ▁pyg ma eus ) ▁is ▁much ▁smaller , ▁with ▁a ▁sk ull ▁length ▁less ▁than ▁. ▁It ▁also ▁la cks ▁the ▁dark ▁d ors al ▁stri pe ▁of ▁the ▁Beng al ▁slow ▁l oris , ▁has ▁dark ▁brown ▁fur , ▁and ▁longer ▁ears . ▁ ▁The ▁Beng al ▁slow ▁l oris ▁has ▁a ▁small ▁sw elling ▁on ▁the ▁vent ral ▁side ▁of ▁its ▁el bow ▁called ▁the ▁bra ch ial ▁g land , ▁which ▁secre tes ▁a ▁p ung ent , ▁clear ▁o ily ▁to x in ▁that ▁the ▁animal ▁uses ▁def ens ively ▁by ▁w ip ing ▁it ▁on ▁its ▁to oth comb . ▁The ▁oil ▁has ▁been ▁analyz ed ▁using ▁gas ▁chrom at ography ▁couple d ▁to ▁mass ▁spect rom etry , ▁and ▁it ▁has ▁been ▁shown ▁that ▁almost ▁half ▁of ▁the ▁several ▁dozen ▁vol atile ▁or ▁semi - vol atile ▁chemical