ig2i.] J. .Stephenson; Indian Oligochaeta, 761 



of 40 mm., a diameter of 175 mm., and 108 segments. Bourne's 

 data are rather unusual,- length 60 mm., segments 61 ; it is un- 

 common, in a small worm such as this, to find the segments on an 

 average i mm. long ; his specimens must have been unusually re- 

 laxed. The prostomium is epilobous 2/3. The dorsal pores begin 

 in one specimen in groove 3/4, in the other in 4/5. 



The numbers of the setae correspond to Bourne's figures. I 

 found 50 in an anterior segment, and 46 and 47 in the middle of 

 the body ; the ring is closed ventrally, and almost so dorsally {zz= 

 2yz). 



It is not always the case, as Bourne says, that a segment 

 which has the outer (dorsal) position of the nephridiopore on one 

 side has the inner (ventral) on the other ; the alternation of the 

 position in successive segments is not strict, and hence the above 

 statement of Bourne's sometimes holds and sometimes does not ; 

 the rule however is as given by Bourne. The nephridia end in con- 

 siderable end-sacs, as in P. sansibaricvs. 



The miale pores, as noted by Bourne, are situated in a median 

 depression ; this has sloping sides, and takes up the whole length 

 of segment xviii. 



Perionyx sansibaricus, Mich. 



Small jungle sireanilet, Bandy Shola, near Coonoor, Xilgiris ; ca. 5500 ft. 

 S'ivigiQ. N. Annandale and R. B. S. Sewell. Eight specimens. 



Small jungle stream, l.ongwood Shola, near Kotagiri, Nilgiris. 4-'iV 

 1910. N- Annandale and R .B. S. Sewell. Three specimens. 



I append a few notes which serve to amplif}^ previous descrip- 

 tions. 



The dorsal pores in a number of specimens examined begin 

 as far forwards as groove 2/3 ; in one the pores appeared rudi- 

 mentary in 2/3 and 3/4, and were well marked behind this. 



The small male field varies in appearance ; it is always 

 depressed, but the depression may be rectangular, oval, or nearly 

 circular, the bottom flat or marked by a transverse groove at the 

 ends of which the pores probably lie ; the sides may be steep or 

 gradually sloping. I did not in these specimens observe, as I did 

 in a previous batch (15), that the setal ring was continued across the 

 ventral surface immediatelj' behind the male pores. 



The clitellum, not well marked, extended over segments xiv — 

 xvi (=3). 



No septa are noticeably thickened. The gizzard, in vi, is ex- 

 tremely rudimentary. I found no calciferous gland-like swelling 

 of the oesophagus in segment xii. The last heart is in segment xii. 

 The position of the alternating nephridiopores is about 2/5 of the 

 half-circumference from the midventral and 1/5 of the half-circum- 

 ference from the mid-dorsal line. 



The spermathecal diverticulum consists of three or four close- 

 ly aggregated seminal chambers. 



There are no penial setae. 



