414 



MR. R. I. POCOCK ON THE EXTERNAL 



slightly bowed, and much less distinctly bilobed anteriorly than 

 in Procyon or Euprocyon" I infer from this description that the 

 baculum is of a simple type, resembling somewhat closely that of 

 Nasua. I presume the bone was taken from an adult animal. 

 If so, its small size as compared with that of Potos and the 

 difference in the formation of the tip are interesting, although 

 there is, of course, no reason to suppose that Bassaricyon is in 

 any way nearly related to that genus despite their superficial 

 resemblance in some particulars. In connection with the com- 

 parative shortness of the bone, it must be remembered that 

 Bassaricyon is the smallest member of the so-called Procyonidpe. 



Text-figure 13. 



A. Upper side of baculum of Potos. 



B. The same of Bassariscus astutits (immat.). 



C. „ „ Ailurus fill gens. 



D. „ „ Nasua nasua. 



E. Proximal end of baculum of Ailurus from below. 

 ¥. Lateral view of baculum of the same. 



G. ,, „ ,, Bassariscus astutus (after Blainville). 



H. ,, „ apex of baculum of Nasua. 



I. The same oiJentinhia (after Lonnberg). 

 K. „ „ Potos. 



L. Upper side of tip of baculum of Jentinkia (after Lonnberg). 

 Figs. A, D, H, K X 2 ; the rest natural size approximately. 



In Potos the baculum is somewhat shorter than in Nasua, but, as 

 in that genus, it is straight or slightly curved, subcylindrical, and 

 attenuated. The apex differs from that of all the genera referred 

 to the Procyonidse. It ends in four condyle-like processes, one 

 smaller, directed upwards and outwards on each side, and two 

 at the end separated by a wide and deep notch. The two 



