PART If. 



Of the Dermoid Covering. 



THE Dermoid Covering, or tissue of the body, consists in. the 

 Skin; its Sebaceous organs; the Nails; and the Hair. 



CHAPTER I. 



OF THE SKIN. 



THE Skin (Pellis, Cutis, hp/**) is extended over the whole 

 surface of the body, and thereby constitutes a complete invest- 

 ment of it. At the orifices of the several canals which lead 

 into the interior of the body, as the mouth, nose, vagina, anus, 

 and urethra, it does not cease abruptly, but is gradually con- 

 verted into the mucous membrane of the part, so that it is 

 plainly continuous with it. At certain places, on the middle 

 line of the body, the junction of the skin of the two sides is in- 

 dicated by a change in its appearance, called Raphe; as on the 

 upper lip; from the navel to the pubes; on the scrotum, and in 

 the perineum; in all of which places, in the development of the 

 fo3tus> the two sides of the body are later in uniting than else- 

 where. 



The colour of the skin varies in different nations: it is black 

 in the negro; of a copper colour in the American savage; 

 bronzed, or tawny, in the Arabian; and white in the Europeans 

 and their descendants. It is also subject to various shades, 

 from the mixture of these races, and from the influence of cli- 



