542 EICHARD EVANS. 



(d) The Median External Openings. — There are three 

 of these openings^ namely, the mouth, the genital orifice, and 

 the anus. 



The Mouth : — The mouth is in an exceedingly extended 

 condition, and consequently all the papillae surrounding it are 

 clearly seen (PI. 38, fig. 1). The incomplete circle of inner 

 papillae consists of four pairs symmetrically arranged on either 

 side of the anterior moiety of the mouth. The outer circle, 

 which is complete, has a pair of papillae symmetrically situated 

 in front of the mouth, and a median one behind. The latter 

 seems to be composed of three papillse which are united to- 

 gether. The papilla3 placed laterally to this median one are 

 specially enlarged, and, like those of the incomplete ring 

 situated in front, form the boundary of the buccal cavity. 

 Owing to the extruded condition of the mouth it is possible 

 to make out three pairs of papillte in the interior of the 

 buccal cavity behind the jaws. The tongue, situated in front 

 of and between the jaws, carries a number of complex 

 denticles. All the papillae surrounding the mouth are pro- 

 vided with one or more spines. 



The Genital Orifice. — The genital orifice is situated 

 between the penultimate pair of legs. It has the form of a 

 transverse opening surrounded by tumid lips, made up of 

 numerous white papillee, similar to those which surround the 

 buccal cavity. 



The Anus: — The anus is a slit-like aperture" situated at 

 the terminal end of the short anal cone. It inclines towards 

 the dorsal surface rather than towards the ventral, a result 

 brought about probably by contraction. 



(e) Antennae, Jaws, Oral Papillae, Legs and Feet. 

 The AntenuEe :— The antennte present the same general 

 characters as in the other species of the genus Eoperipatus. 

 The club-shaped appearance of the distal extremity is much 

 less marked. The number of rings that can be counted with 

 certainty is forty-seven, as in B. sumatranus and in some 

 of the specimens of E. Horsti and E. Weldoni. It seems, 

 however, that there are a few small rings intercalated among 



