CLASSIFICATION OF THE SCIURID.E. 



231 



slightly expanded truncated apex. The orifice is in the median 

 ventral line, nearer the tip of the glans than in Euxerits 

 erythropas. (Text-fig. 25, A-D.) 



The baculum, measuring 8 mm., has a much longer proximal 

 subcylindical portion than that of Uuxerus, and the upper 



Text-figure 24. 



A. Baculum of TSuxerus erythropus, from the left side. 



B. The same from above, without the cartilaginous crest. 



C. Baculum of another specimen, ticketed J5. erythropus. 



D. Baculum of Geosciurus capensis, from the left side. 



E. Apex of the same from above. 



F. Apex of the same from the front. 



G. Baculum of Atlantoxerus getulus, from the left side. 

 H. The same from above. 



I. Tip of the same from the front. 

 K. Baculum o( Xeriis rutilus, from the left side. 

 L. The same from above. 

 M. Tip of the same from the front. 



surface of the terminal portion is an elongated area rather more 

 than twice as long as broad, with a low median crest, a rounded 

 spatulate hollowed apex, and distinctly constricted sides. The 

 lower side of the terminal portion is developed into a median 

 vertical crest. (Text-fig. 24, D-F.) 



16* 



