494 RICHARD EVANS. 



there is an U-sliaped papilla, which surrouuds the outer 

 ang'le of the crural g-roove. Such a structure was not found 

 on all of them, but it was observed on the second, the fourth, 

 the seventh, and other pairs of legs. Its occui-rence on some 

 of the leg's of the anterior five pairs contrasts with the con- 

 dition found in Horsti, where the whitish papiihe do not 

 appear on the legs situated in front of the sixth pair, which 

 is supplied with them in both male aud female. In the ante- 

 rior half of the female Weldoni the U-shaped bodies are 

 often divided into two papillae, situated close together aud 

 flattened ag-ainst each other — a condition found to occur on 

 the sixth to the twelfth pair of legs in the male Horsti. 



The Reual Apertures: — The openings of the renal 

 organs are situated in the crural grooves at the junction of 

 the legs with the body, except in the fourth and fifth pairs, 

 in which they are removed to the vicinity of tin; proximal 

 pad of the leg. 



'JMie actual position of the renal papillte of the fourth and 

 fifth pairs of legs differs in the two species here described. 

 In the species Weldoni they are situated in the proximal 

 pad, and therefore divide it into two (fig. 9) ; but m the 

 species Horsti they are situated on the proximal side of 

 the pad (fig. 21). The position of these openings in E. 

 Sumatranus agrees with that of the species Weldoni, 

 and not with that of Horsti. 



The position of the renal papillae of the fourth and fifth 

 pairs of legs in Eoperipatus is different from that found 

 in any other genus of the Onychophora. It is more primi- 

 tive than even that found in the genus Peri pat us, which is 

 its closest ally. 



Renal pores do not occur on the penultimate or on the last 

 pair of legs in the males. They are found, however, on the 

 last pair of legs in the female of the species Horsti, in which 

 there is a large renal organ in the segment behind the genital 

 one. They were not seen in the adult female of the species 

 Weldoni, in which the outer end of the renal duct of the 

 penultimate segment seems to disappiar in the adult. 



