66 Memoirs of the Indian Museum. [Vor. VI, 
First dorsal pore in groove 11/12. 
The setae are paired,—the ventral setae very closely in the anterior part of the 
body; they are small, especially towards the front end, and the ventral setae are not 
recognizable in a number of segments in front of vil; lateral setae are apparently 
present throughout, but they also are difficult of recognition in front of vii. In the 
anterior region aa=ca.Ioab; bc is about 2aa and cd about 4aa, 1.e. the setae of 
the lateral couple are separated by an interval three times as great as that between the 
setae of the ventral couple. Behind the clitellum aa=8ab, in the middle of the body 
aa=bab, 1.e. the pairing of the ventral setae is not so close. The setae d are below 
the lateral line of the body; dd=# of the circumference. 
The clitellum is slightly marked, and apparently extends over xiv-xvii—4. The 
ventral surface is here slightly flatter and smoother. 
The male pores are on xviii; the ventral surface of the segment between the 
situation of the apertures appears as a rectangular depression. The porophores 
occupy the lateral walls of the depression, and so face inwards (strictly inwards and 
ventralwards) ; they are relatively small projections situated in ab. 
The female apertures are minute, paired, on xiv, in front of the line of the setae, 
near each other and considerably internal to a. 
The spermathecal apertures are small, in grooves 7/8 and 8/0, in line with a or ab. 
Internal anatomy.—Septum 5/6 is slightly, 6/7—11/12 considerably thickened ; 
12/13 is somewhat and 13/14 slightly thickened. 
The gizzard is large, globular, in segment v. I at first placed it in vi, but my 
attention was arrested by a baggy membrane around its posterior end; this proved 
to be the hinder portion of septum 5/6; the septum is closely adherent to the surface 
of the gizzard, but can be separated by careful dissection. 
Calcareous glands are present in segments x—xiii. They are well set off, being 
attached to the oesophagus by a narrower portion or pedicle; they are flattened 
antero-posteriorly between the successive septa; their margins are rounded, and semi- 
circular in outline. Vascular channels radiate on anterior and posterior surfaces in 
a fan-like manner towards the periphery of the gland. In segment xi the seminal 
vesicle extends as a lobed fringe all round the margin of the gland. 
The intestine begins in xvi. 
The last heart is in xii. 
The anterior part of the body presents micronephridia, which are situated 
mainly on the septa, and so appear in the dissection as a ring round the alimentary 
canal at the site of each septum; there are the usual large tufts behind the pharynx, 
in between the anterior septa. Towards the posterior end of the animal, besides a 
number of micronephridia which on dissecting in the usual way remain on the septa 
around the gut, there are distinguishable (i) a very regular longitudinal chain of 
micronephridia on the body-wall, between setae a and b of each segment ; these might 
be said to be of moderate size,—large for micronephridia, though very minute for 
meganephridia ; they are visible without difficulty by the naked eye; (ii) a similar but 
less regular series, with a similar relation to setae cd; these are about of the same size 
a a 
tasse “Rs nd de 
