72 



THE GENERAL ANATOMY OF THE LEMUROIDEA [SECT. A 



proximal and interdigital pads appear as divergent and spirally 

 curved lines. These are however related in a definite way, as shewn 

 in Fig. 40 where the scheme of a series of loops (closed distally) is 

 revealed. The presence of four tri-radii (Fig. 40, T^ — 2\) should 

 be noticed. The loops are of course interrupted by the nodular 

 character of the central portions of the planta, but on these 



Fig. 40. Scheme of the papillary ridges of the foot of a Lemur. (After 

 Schlaginhaufen, op. cit.) Tj — T i are the tri-radii mentioned in the text. 



nodules lines in the appropriate direction can be detected with 

 a lens. The apical pads are marked similarly to those of the 

 hand, but that of the hallux is unusually large, and it is only 

 here that the summits of the loops (sinus) are seen strictly on the 

 plantar aspect. The phalangeal aspects bear nodules, and some of 

 these are grooved in the case of each digit save the first ; thus 

 a slight difference is noticed between the hand and the foot. 



