384 Records of the Indian Museum. [Vol. VIII, 



The prostate (fig. 7) is large and conspicuous. It occupies 

 two segments, xvii and xviii, and is almost cut into two by 

 a deep indentation in the situation of septum Is ; each of these 

 two principal lobes forms a compact mass with its surface some- 

 what indented into secondary lobes. The two chief lobes are 

 connected ventrally by a narrow junction from which arises the 

 duct. The vas deferens joins the anterior of the two chief lobes 

 not far from the origin of the prostatic duct. The latter is short, 

 consists of a single U-shaped bend, and ends in segment xvii. 



The ovaries are situated in segment xii; they are large, and 

 consist of a number of finger like processes. The funnels are small. 



The spermathecae (fig. 8) are two pairs, in segments vi and 

 vii, opening in furrows f and I, i.e. in the furrow behind the 

 segment in which they lie ; they are situated in the middle of 

 large tufts of micronephridia. Bach is a subspherical or rather 

 pyriform sac, of moderate size, narrowing to be implanted on the 

 body- wall, with scarcely anything that can be called a duct. 

 There is a single diverticulum situated on the anterior side of the 

 ampulla, to which it is about equal in length ; the diverticulum 

 is club-shaped, being rather wider at its inner than at its outer 

 end, and arises from the duct of the main sac in the substance of 

 the body-wall. 



The presence of the same grooves, and the same wart-like 

 projections, on the genital area, as well as the similarity of the 

 spermathecal apparatus, indicate a near relationship between the 

 two species just described. On the other hand the considerable 

 difference in size, the presence of only three pairs of calcareous 

 glands and two pairs of seminal vesicles, and the characters of the 

 prostate in the second form, appear to justify the distinction of 

 the two forms as separate species. 



Plutellus aborensis, sp. nov. 

 (PI. xxvi, figs. 9, 10.) 



Rotung, alt. 1300 ft., on path ; 26-.\ii-i9ii. A single specimen. 



Length 4 inches ; diameter relatively small, at anterior end 

 3 mm., posteriorly only iv mm. Colour pale throughout. Seg- 

 ments 385. 



Prostomium small, prolobous, under cover of segment i. Seg- 

 ments i-iv consist of single annuli, v of two annuli ; and the rest 

 of three ; this secondary annulation however is lost towards the 

 posterior end. 



The dorsal pores are large and conspicuous ; the first is in 

 furrow T'b. 



The setae are in general very small and inconspicuous, and 

 in front of segment xi it is very difficult and for the most part 

 impossible to distinguish them ; those most easily visible are 

 between segments xiv and xxi. The following ratios were estab- 



