990 



MR. W. L. H. DFCKWOETH OX 



[Dec. 13, 



3. The comparative breadth of the interorbital space ; which is 



great when compared to that of many Gorillas. 



4. Characters of the upper lip : the great distance from the base 



of the septum nasi to the margin of the hp ; and the absence 

 of the median furrow which is so marked in many Gorillas. 



5. The sleuderness and narrowness of hand and foot. 



6. The relatively great development of poUex and hallux. 



7. The small size of the teeth ; these are much worn, the third 



molars the least ; there are indications that, originally, four 

 cusps were present in the upper molars. As regards the 

 lower molars, those of the third pair show comparatively 

 little wear, and have three large and two subsidiary cusps. 

 The average transverse diameter of the crowns of the 

 molar teeth is 10-4 mm. as against 14 mm., which is the 

 corresponding average in the skull (at Cambridge) of an 

 undoubted female Gorilla. \_Cf. Table I. infraJ] 



8. Muscidar system. A plautaris muscle is present in the right 



lower extremity. I cannot find any record of this in a Gorilla 

 up to the present. 



Table I. — Bimensiotis of Teeth (in millim.). 



A.P. = Antero-posterior, T. — . Transyerse diameter of 

 crown of molar. 



These are the principal points to which one refers in attempting 

 to assign the creature to a recognized species ; and, in my opinion, 

 they indicate that this specimen is more correctly designated a 

 Chimpanzee than a Gorilla. The hair is so scanty as to afford no 

 reliable evidence on the subject. 



I have been led from this case to collect some illustrations and 

 descriptions of some of the Anthropoid Apes which have in former 

 years presented difficulties when the determination of their species 

 for descriptive purposes came into question. 



The accompanying diagram (p. 991), in which, however, the 



