EOPERIPATUS BUTLERI. 545 



species wliicli agree with one another to a wonderful extent as regards their 

 accessory structures. Tlie figure was carefully traced with the camera lucida 

 by the author, and very carefully finished by Mr. P. Bayzand. 



Fig. 2.— This figure represents the Jatero- ventral aspect of the sixth leg of 

 the right side. Note the presence, in addition to the usual four crescentic 

 pads, of a vestige of a fifth pad; the two papillae on the distal margin of the 

 foot, and the four ventral prominences. Note that each prominence of the 

 distal pair carries two spines, those of the proximal pair being provided with 

 only one each. 



Fig. 3.— Tliis figure represents the crescentic pads of the fifth leg of the 

 light side. Note that there is no trace of a fifth pad, and that tlie renal 

 papilla is situated in the fourth pad, and divides it into two halves. 



Fig. 4.— This figure represents a portion of the skin of the dorsal surface. 

 Note the narrow, clear line which occu|)ies the mid-dorsal position; the large 

 primary papilla; which stretch almost across the ridges from one groove to 

 another; the numerous accessory pai)ill8e which are scattered among the 

 primary ones, and which follow no definite arrangement ; and finally, the 

 narrow fold with small papilla; which fails to reach the mid-dorsal line. 



Fig. 5.— This figure represents a portion of the skin taken from the area 

 situated immediately above one of the legs, the upper limit of which is shown 

 at the lower end of the figure, where the papillae arc arranged in oblique rows. 

 Note that the ridges above the leg break up into patches. Compare the two 

 ridges, one on either side of the figure, with those shown in the previous 

 figure, and note the gradual diminution in number of the accessory papilla;. 



Fig. G.— This figure represents the outer blade of the jaw. 



Fig. 7.— This figure represents the inner blade of the jaw. Note the three 

 small denticles situated on the inner side of the main tooth, and the great 

 number of smaller denticles on the inner side of the diastema. Note the large 

 size of the jaw-blades as compared with those of E. Weldoni, and especially 

 of E. Horsti. 



