INTEGUMENTARY SYSTEM 99 



for instance) and inheritance of the tendency. Isolated cases 

 are recorded where, by a curious persistence of embryonic con- 

 ditions, certain parts of the body retain an abnormal covering 

 of hair throughout life. Such are those human beings with 

 tufts of hair in the inguinal region and the so-called hairy 

 men or " poodle-men," whose faces are completely clothed 

 with hair, resembling the faces of poodles (see Figs. 51 and 

 52). Formerly, no satisfactory explanation of this condition 

 could be offered, and still less of the correlated abnormal con- 

 dition of the teeth which resemble those of the edentata. But 

 since the influence of the N. trigeminus on the development of 

 the hair on the face and of the teeth has been made the sub- 



FIG. 51. Russian hairy man. FIG. 52. Julia Pastrana. 



(Ranke, Der Meiisch.) (Haeckel, Anthropol.) 



ject of special study, we are inclined to attribute such phenomena 

 to a disturbance of the N. trigeminus during foetal development. 

 It is a striking fact, however, that the strange condition is 

 strongly inherited. Hence the explanation of atavism is in- 

 voluntarily suggested to our minds, together with Darwin's 

 conclusion that the ape-like ancestors of man must have been 

 completely covered with hair, and that both sexes possessed a 

 beard. 



The hair on the forearm is in man, as in the anthropoids 

 and most of the mammals, directed upwards towards the elbow 

 (Schwalbe). 



Man is distinguished from the anthropoids by the arrange- 



7* 



