LÖNNBERG, NOTES ON GUANACOS. 



length of the three lower molars is in the Peruvian Guanaco 

 57, and in the Patagonian 72 mm. The transverse thickness 

 of the foremost lobe of ra 3 is in the former 8,3 in the latter 11 

 mm. The third (hindmost) lobe of m 3 is also very much more 

 strongly developed in the Patagonian than in the Peruvian 

 Guanaco. On the whole the lower jaw of the latter is heavily 



Fig. 3. Lateral aspect of the skull 

 of the small Peruvian Guanaco- 



Fig. 4. Lateral aspect of the skull of 

 the Patagonian Guanaco. 



built so that its breadth and height in its anterior parts are 

 almost equal to those of its larger relative. But the difference 

 in length is the greater, the distance from the angular process 

 to anterior end of the symphysis being 250 mm. in the Pata- 

 gonian, and 205 in the Peruvian Guanaco. 



The sagittal and occipital crests are strongly developed 

 in the male of the small Peruvian Guanaco. 



