( 394 ) 



may be compared with other simihir skins, on which are designed 

 likewise the boundaries of the isolated dermatomata. 



Tiiis is done in the following manner. r)n the skin of the corpse 

 tiie ini(l-\eiitral line of the trunk is drawn, and upon this line is 

 designed on the sternum a point (\ situated between the affixture of 

 the 2^^ and 3' rib. 



Heginning from this point, we next design, on the ventral side of 

 the maximum abducted foreleg turned towards us, a line in the longi- 

 tudinal axis, passing through the plica cubiti cranially of the epicon- 

 dylus niedialis humeri straight through the plant of the hand, towards 

 the middle of the plant of the third linger. 



This having been done on both sides, the stripping off of the skin 

 may begin. 



In the first place a circular incision, beginning above the third 

 neck-vertebra is made around the neck, perpenchcularly upon the 

 longitudinal axis of the animal. 



Next a similar circular incision is made around the trunk over 

 the 17''' vertebra. 



Thirdly these two circular incisions are united by a skin-incisiou 

 in the mid-ventral line. 



Fourthly olecranon and epicondylus humeri medialis are marked 

 on the skin by means of a striking colour. 



l-'ifflily an iiicision is made on the extremity along the ventral line, 

 t-untijiued through the plant of the third finger. That half of this 

 latter situated next to the thumb, is stripped off, the web l)etween 

 the 'M and the 2'^^ finger is split open between fore- and back-side; 

 next the i)lant of the 2^ finger is stripped off, the web between the 

 2^ finger and the thumb is split, and the plant of the thumb is loosened. 



The same operation is then performed for the finger-plants and 

 webs of the ulnar fingers. 



Finally the skin on the back-side of the fingers is loosened, the 

 end-phalanges of each finger being cut one by one, in such a way 

 that the nails remain affixed to the skin of the back-side. Both hands 

 beinü thus stripped off, the animal is Hayed further. 



The piece of skin, obtained in this manner, with the boundary- 

 lines designed upon it, is next stretched, tanned and dried. xA.fter- 

 wards the insensible areas are coloured white by means of oil-paint 

 and then varnished, and under control of the originally obtained 

 photos such a piece of skin may be compared with other similar ones. 



These skins are read in the following manner (fig. L5) : .4.4' is the 

 cranial boundary (the incision around die neck), 5^' the caudal boundary 

 (the incision around the trunk). Of course the point C recurs four 



