125 



Hair is continued to the ungual extremity of the 

 phalanges of both manus and pes; the heels in the fully- 

 haired embryo are almost wholly naked. 



The hair when first present is so pale as to be practically 

 colourless; when the embryo is fully haired the hair is of a 

 very pale brown. 



Fig. 9. 

 Left manus, 35 mm. stage. 



Stnsory Papillae and Vibriscae. — Sensory papillae are 

 developed at the 35 mm. stage and vibriscae are present at 

 50 mm. The first papilla to appear is the ulnar-carpal. 



Facial Vibriscae. — The mysticial set consists of 6 rows 

 of papillae (in CoUett's description 7), giving rise to 2, 5, 7, 6, 

 6, and 5 backwardly-directed, pale vibriscae, respectively. 

 The supraorbital papilla is large, and gives origin to 2 

 vibriscae. The genal bears 6 long sensory hairs. The 

 interramal is inconspicuous, with 2 pale hairs; and the 



