1917] J- Stephenson : Indian Oligochaeta. 411 



which cause a lobulation of the surface, and the duct stout, slightly- 

 curved, and about as long as the terminal sac. 



The penial se^ ae (fig. 30) are in length 5-3 mm., and in thick- 

 ness near the base 50 r ; near the tip the thickness is still 44 /x. The 

 shaft is almost straight, slightly bowed towards the tip, where it 

 tapers rather rapidly to a fine point The distal portion of the 

 shaft, about '85 mm., is ornamented (except the extreme tip) 

 with very numerous and densely crowded transverse markings, 

 each consisting of a few points set side by side. 



Remarks. — Several species of Eutyphoeiis run to a large size ; 

 thus E. paivai may be 195 mm. in length, and E. walloni 230 mm., 

 while E. chittagongianus is the same length as the present 

 specimen. 



A rather curious feature of the present species is the presence 

 of intestinal caeca resembling those of Pheretima. 



Subfam. TRIGASTRINAE. 



Gen. Eudichogaster. 



Eudichogaster chittagongcnsis, sp. nov. 



(PI. xviii, figs. 31-33)- 



W. 71/1. Rangamati, Chittagong Hill Tracts, Bengal, i i-vii-1915. 

 R. Hodgart. Two specimens. 



External characters. — Length 30 mm. ; diameter i'5 mm., the 

 swollen preclitellar portion 2 mm., the constricted clitellar region 

 just under i mm. ; a curious appearance is given by the bulbous 

 anterior end followed by the constricted clitellum. Colour an in- 

 definite grey. vSegments approximately 121. 



Prostomium epilobous | or a little more ; it is triangular, the 

 blunt apex being directed posteriorly ; the apex may be continued 

 backwards as a shallow groove as far as the furrow between the 

 first and second segments. 



The dorsal pores begin immediately behind the clitellum. 



The setae are paired. Behind the clitellum ah = \aa = ^bc 

 = ^cd, and ^ is below the lateral line of the body; towards the 

 hinder end of the body the setae are less closely paired, and ab = 

 ^aa, = %bc = ^cd, be and cd being equal or very nearly so, while 

 d is about the lateral line of the body. 



The clitellum is smooth and constricted, and extends over 

 segments |-xiii- |xvii (over the whole of xiii on the ventral surface). 



There is a depression behind the slightly excavated posterior 

 border of the clitellum ; this depression, elongated in the trans- 

 verse direction, thus takes up the hinder part of segment xvii, but 

 does not extend beyond it. On its sloping sides are the male 

 apertures, short obliquely placed slits, their anterior ends nearer 

 the middle line than the posterior ; they are situated between the 

 lines of setae a and 6, which are absent from segment xvii (fig. 31). 



The female apertures, on segment xiv, appear as transverse 

 cracks one on each side just in front of seta a. 



