8 ARKIV FÖR ZOOLOGI. BAND 14. N:0 20. 



With regard to the shape of the nose-pad this specimen 

 as well as another, which I referred to L. parilina in my 

 »Second Contribution — », agrees with Thomas' description. 

 The interorbital region is in the present specimen narrow, 

 as it ought to be in parilina. The carnassial is, however, 

 much smaller than in the type of parilina. In the formerly 

 reeorded specimen on the other hand the carnassial is big 

 enough, but its interorbital region is too broad. If to this 

 is added, that an Otter from Merida in this Museum has a 

 similar nose-pad, the interorbital region narrow as in the 

 type of parilina in spite of its origin, and a carnassial of 

 nearly the same (small) size as that of the present specimen 

 from Gualea, the condition of these »species» from Merida 

 and Western Ecuador appears somewhat doubtful.^ There is 

 apparently a rather great variation with regard to the cha- 

 racteristics used for distinguishing the Otters from Western 

 Ecuador and those from Merida as the following table of 

 measurements proves: 



Cyndylobasal length 



Zygomatic breadth 



Interorbital breadth 



Tip to tip of postorbit. processes 



Mastoid breadth , 



Combined breadth of incisors . , 

 Length of p* on outer side . . . 

 Greatest diagonal diameter of m* 



With regard to colour the two specimens from Gualea 

 are alike, but the one received now is a little more whitish 

 on the throat and has (no doubt an individual anomaly) the 

 extreme tip of the tail white. 



^ When apeaking about Peruvian Otters (Proc. M. S. Nat. Mus., Vol. 

 58, 1920, p. 225) Thomas himself has said: ^Whether the value of the 

 character needs revision only much further material will show», 

 ' Quoted after Thomas. 



