3g6 Records of the Indian Museum. [Voi., VIII, 



The genital setae are present as a considerable bunch, con- 

 tained in a sac between prostate and intestine. In length they 

 are 2 mm., in breadth i8 /-. They are straight except for a 

 slight curve towards the tip; the extremity is pointed, and the 

 distal part of the shaft shows a number, 20 or more, of circlets 

 of small spines ; the circlets are closer together near the distal 

 end. Thev thus closely resemble those of P. koboensis. 



Pcrionyx foveatus, sp. nov. 

 (PI. xxvii, figs. 15, 16.) 



Renging, in rotten wood; ig-xii-1911. One complete specimen and 

 two fragments together composing a second specimen. 



Same place and date. Four specimens. 



Rotung, alt. 1300 ft., in rotten wood; 28-xii-igii. A single speci- 

 men. 



Upper Rotung, found road-making ; 5-i-igi2. A single specimen. 



Length max. 2 inches; diameter max. 3 mm. Colour, dor- 

 sally dark brown to dark purple, ventrally paler. The ventral 

 surface behind the clitellar region is concave in transverse section. 

 Segments 112. 



Prostomium epilobous h ; it shows a slight median longi- 

 tudinal groove. There is no intersegmental furrow between 

 segments i and ii. 



The first dorsal pore is either in furrow I or 1. 



The setae are disposed in rings which are unbroken ven- 

 trally. Dorsally there is an interval, zz averaging 2-2hyz, but it 

 is irregular, its limits being about i\-'^yz. Ventrally the setae 

 are set much closer than dorsally. In number about 48 were 

 counted in segm.ent X, about 45 in xx ; they are difficult to dis- 

 tinguish dorsally owing to the dark colour of the worm. 



The clitellum includes segments xiii-xvii or ixviii=^ 

 5-5I ; the body was constricted here in most specimens, but 

 swollen in one of the batches from Renging, Setae are present 

 but dorsal pores absent. In the Renging specimens just men- 

 tioned the clitellum showed a secondary annulation, due to the 

 appearance of a groove round the middle of each segment in 

 the situation of the setal ring. 



The male pores are on segment xviii, rather posterior to 

 the line of the setal ring. They are rounded apertures of some 

 size, with indistinct circular lips, and distant from each other 

 about \ of the circumference. In furrow H, in front of and 

 slightly internal to the male apertures, are situated a pair of 

 rather irregular somewhat puckered depressions, or pits, 

 connected with each other across the middle line bv a groove 

 which is convex backwards (fig. 15). The mid-ventral region 

 between the pits and apertures of each side is depressed. Com- 

 plete; rings of setae are present on segments xvii and xix ; the 

 ring is interrupted on xviii by the male pores ; mid-ventrally 



