CLASSIFICATION OF THE SCIURIDtE. 227 



thicker and more irregular in shape, being markedly asymmetrical 

 and not so sharply marked off from the swollen median portion. 

 The oi-ifice appears to lie in the swollen median portion beneath 

 the proximal end of the distal portion. When at rest within 

 the abdomen the terminal half of the distal portion lies in the 

 prepuce and is bent like a hook, and the penis does not extend 

 beyond the prepuce as in Heliosciiirus rufohrachium described 

 below. (Text-fig. 23, 0, D.) 



The di-ied distal portion of the glans of a specimen of 

 Funisciurus 'pyrrhopus from Ashanti, in the British Museum, 

 agrees in all essentials with that of F. leucostigma, except that 

 the apex is better defined and more like an arrow-head. The 

 baculum, a simple rod measuring about 1"5 mm., is imbedded in 

 the serrulated area, its distal end not reaching the tip of the 

 glans. 



In a similai'ly preserved part of the glans of F. congicus, with 

 the tissue of the serrulated area cut away leaving the baculum 

 exposed, the baculum is a slightly curved rod about 2 mm. in 

 length, and the dried tissue of the apex of the glans, still attached 

 to the distal end of the baculum, is lanceolate. (Text-fig. 19, D.) 

 In Paraxerus cepapi the glans is very similar to that of Funi- 

 sciurus leucostigma. The proximal portion is very thick and 

 short, and bent on itself, its convex surface having a median line 

 of serrulations. Distally this thickened portion shows grooved 

 flaps of soft tissue. The terminal process is very like that of 

 Funisciurus leucostigma, being broad at the base, pointed at the 

 apex, and provided dorso-laterally on each side with a serrulated 

 crest. The sides of this process are, however, concave, so that 

 the dorsal area bordered by the crests is much narrower in the 

 middle than behind and in'front. (Text-figs. 23, H, I ; 19, E, F.) 

 The diied process of the glans of a specimen of Paraxerus 

 palliatus from Zululand, in the British Museum, is tolerably 

 similar, but the serrulated area is somewhat sharply constricted 

 in front, so that the tip of the process is better defined and more 

 arrow-headed in shape and the middle of the serrulated area is 

 broad, broader indeed than its proximal end, where it rises into 

 a crest. The baculum, measuring less than 2 mm., is imbedded 

 in the process of the glans behind the apex and between the con- 

 strictions. (Text-fig. 23, K, L.) 



The dried condition of the distal portion of the glans penis of 

 Funisciurus pyrrhopus and of Paraxerus p)(''lliatus makes their 

 comparison with that of the spirit-preserved material of F. leuco- 

 stigma and Paraxerus cepapi a little unsatisfactory. But the 

 general similarit}^ between the penes of these two so-called genei-a 

 admits of no doubt. I suspect Tullberg overlooked both the 

 baculum and the serrulated cr-ests in the specimen he referred to 

 Sciurus poensis. 



In an adult male of Heliosciurus rufohrachium hardyi the 

 penis is of exceptional length. When extended it reaches as far 

 as the posterior end of the sternum, and measured from its 



