346 Records of the Indian Museum. [Vol. X^ 



iiig one, and because points of difference, in detail at least, 

 are numerous. Tlie presence of two pairs of ovaries is a curious 

 anomaly. 



Octochaetus dasi, sp. nov. 



Baroda; 2-viii-i9i2; Bishambar Das. Two mature and one 

 immature specimen. 



Length 80 mm. ; breadth 4 mm. ; colour pale grey throughout, 

 except clitellum which has an orange tinge. Segments 192. 



Prostomium small, with a pointed posterior tongue which 

 extends backwards mid-dorsally through half the length of seg- 

 ment i. Segments v-vi biannulate, vii-x triannulate. 



First dorsal pore at anterior border of clitellum, in 

 furrow ifi. 



Setae all on the ventral surface, paired; behind the clitellum 

 aa = 2\ab = bc '^ i\cd \ dd=^-% circumference. The setae aa ap- 

 proach closer together near the clitellum, both in front of it and 

 behind. In the anteclitellar region there is no great difference in 

 the ratios; aa and he are relatively a little smaller. 



Clitellum xiii-xvii ventrally, xiii— |-xviii dorsally (5 or 5^) ; 

 according to internal dissection it includes the whole of xviii 

 (perhaps due to non-correspondence of septa with furrows). The 

 clitellum is very distinctly marked off, the body being constricted 

 at its anterior and posterior limits as if by a tightly drawn 

 thread. The body- wall in this region is ver}'- thick and friable. 

 Setae and dorsal pores may or may not be visible on the clitellum 

 (visible in one specimen, not in the other). 



The genital area is characterized by a midventral, rather small, 

 puckered depression, which takes up the length of xviii and just 

 extends on to the adjacent parts of xvii and xix (fig. j). Segment 

 xviii, as will be evident, is short. The actual apertures are not 

 certainly discoverable; there seems to be a pair of (prostatic) 

 pores at the antero- lateral ' angles' (if such can be described) 

 of the depressed area ; it is possible that the male pores are at the 

 lateral border of the area, in line with the setae of xviii, and the 

 posterior prostatic pores at the postero-lateral ' angles ' of the 

 area, but this is really no better than a surmise. 



The female pores are apparently situated in a transverse 

 groove on the anterior part of segment xiv, which extends from 

 just external to the line of setae a to a corresponding point on the 

 other side. 



Spermathecal apertures are not visible; from the internal 

 dissection they must be situated very near the middle line in 

 furrows „ and I. 



The first septum, which is moderately thick, is ,;. This is 

 followed by a long interval^ after which come It— r.^, all moder- 

 ately stout. The rest are thin. Septa ':>-\l are all close together, 

 especially ty and li which are separable with some difficulty. 



A considerable length of the oesophagus is in front of the 

 first septum, being bent under the pharynx. The gizzard is short, 



