496 JOVRNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXIV. 



2. Other setse are nearly of the same size, they are stouter and are f 

 shaped being sHghtly curved anteriorly as well as posteriorly in opposite 

 directions (Fig. 12, Plate I). 



Size. — Length "o mm. 



Thickness •0416 mm. 



Thickness at the nodulus "0572 mm. 



The dorsal pores are large and conspicuous, the first is in intersegmental 

 furrow 10. In some specimens distinguishable on the clitellum also. 



Clitellum (Fig. 5, Plate I) saddle-shaped, very much raised than the rest 

 of the body, ventrally the segments are not modified and the intersegmental 

 furrows are quite distinct. 



Usually the clitellum occupies segments xxvii, — xxxiii or xxxiv 

 (7 or 8) as is stated by Michaelsen (1) and by Piguet (3), but it was 

 observed that in some specimens it occupied xxvi, — xxxiv (=9 segments), 

 while in others xxvii — ^ xxxv (=8^ segments) in others xxvi — ^ xxxv 

 (=:9i segments) and in still others xxvi-xxxv (=10 segments). 



Male pores on segment xv appears as transverse slits between two thick 

 glandular looking lips which overhang anteriorly as well as posteriorly, the 

 lips extend on each side and meet with those of the opposite side and 

 extend on to segments xiv and xvi also (Fig. 9, Plate I), 



Female pores indistinct when seen, they are small openings on segment 

 siv slightly internal to the line of the male pores. 



Sperniathecal 2)ores not seen. 



Genital markings. — Glandular cushion-like borders in the form of ridges 

 continuous with the ventro-lateral borders of the clitellum are present from 

 segments xxxi-xxxiii usually, but in other cases the cushions extend 

 variously on the right and left sides of the same worm (Right ^ xxxi — ^ 

 xxxiv. Left XXX — xxxii or vice versa and so on). There are glandular oval 

 patches on the clitellum ventrally on segments xxvii, xxix, xxx, xxxi, 

 xxxii or on xxvii, xxi^, xxxi and still differently in others ; the glandular 

 patches are in some cases found on both sides, in others alternately on the 

 right and left sides, and in others on some segments on both sides, 

 and on the rest on one side only. When on both sides the glandular a-reas 

 may meet in the middle line forming a continuous ridge. The glandular 

 areas surround the setse a and b (Fig. 10, Plate I). 



Set(e a and h on segments ix, x, xi are in all cases surrounded by glau- 

 dular areas which meet each other and in the middle line to form a raised 

 patch over all the three segments (Fig. 9, Plate I). The thick glandular 

 lips overhanging the male pores and encroaching on the segments xiv and 

 xvi may also be noted here. 



Internal anatomy. — First definite septum is i septa | — ^o ^^^ thickened 

 while -I is very much thickened than others, \x, H also thickened. 



Alimentary tract. — The mouth leads into the buccal cavity which is small 

 and occupies the first three segments. Tlh.e pharynx which follows has thick 

 muscular walls connected with the body-wall by strands of muscle fibres 

 which run obliquely backwards, it extends up to the vii segment. 



The Oesopliayus is a straight tube extending from the pharynx to the 

 xiii segment, it appears dilated in each segment while constricted inter- 

 segmentally. In the segment xi are given oft' short lateral diverticulse or 

 pouches from the oesophagus, these lie in segment x. The calcareous glands are 

 tvFO lateral protuberances on the sides of the oesophagus in xi and xii; these 

 are hollow and in longitudinal sections show lamellated appearance ; these 

 communicate with one another and with the oesophageal pouches lying 

 in front of them. The crop is a large dilated portion of the alimentary 

 canal in segments xiii — xvi. It is a thin walled sac and is separated from 

 the thick walled, gizzard, which follows, by a distinct groove. The Gizzard 



