1015.] J. STEPHENSON : Indian Oligochaeta. IOI 
the setal ring and groove 18/19; the centres of these papillae are very slightly inter- 
nal to a line drawn through the centres of the papillae of the male pores. These 
papillae were not present in the other two specimens; but in one of these there were 
seen a couple of oval patches with a whitish circumference and dark centre, situated 
near the posterior border of segment vii,—each small, with its centre in line with seta 
e; as well as a single eye-like marking in groove 16/17 just internal to the line of the 
male papilla of the right side. 
Internal anatomy.—The septa are all very thin and transparent ,—a condition which 
is no doubt due partly to the bad state of preservation; still it seems safe to say that 
none are notably thickened. The series of septa is complete from 4/5 onwards. 
The gizzard is an ovoid mass in vi. The calcareous glands are four pairs, set off 
from the oesophagus, in segments x—xiii, the glands in x and xi are smaller than the 
others. Each gland receives its blood from a very distinct branch of a supraoesopha- 
geal trunk. The intestine begins in xv or xvi. 
The last heart is in xii; the dorsal vessel can be followed forwards on to the 
pharynx, but no regular series of lateral commissural vessels can be distinguished in 
front of viii. 
The nephridial system consists of both mega- and micronephridia. The megane- 
phridia begin in xx or xxi, and are continued backwards to near the posterior end of 
the body; they are of large size, extending, in the dissection, from underneath the 
margin of the intestine outwards and dorsalwards almost to the mid-dorsal line; they 
consist of three parallel, more or less winding, limbs The condition of the speci- 
mens is unsuitable for histological work, and I was unsuccessful in obtaining a prepa- 
ration of the funnel, which however appears to be situated on the anterior side of 
the septum behind which the nephridium lies; the tube itself is differentiated into 
broad and narrow, nonciliated and, apparently, ciliated portions. The micronephri- 
dia extend throughout the body, they are especially numerous (as is often the case) 
on the inner surface of the body-wall in the clitellar segments, and occur (again a 
common condition) in the form of large conspicuous tufts on each side of the hinder 
end of the pharynx in segments iv and v. 
The testes, along with large much folded iridescent funnels, are contained within 
testis-sacs, in segments x and xi. The vesiculae seminales are three pairs, in ix, x, and 
xii; those in ix and x depend forwards from the posterior wall of their segments, and 
are large and lobed; those in xii depend backwards from septum 11/12, are of mode- 
rate size, and not cut up into lobes. Thus segment x contains both testis-sacs and 
seminal vesicles, xi testis-sacs only; in this latter segment the sacs extend towards 
the dorsal surface, and contain also the hearts. 
The prostates are tubular; the terminal portion forming the duct is thinner and 
more transparent than the coils of the gland itself, and ends in segment xvii. On 
the left side of the specimen examined the gland extended back to xxi, on the right 
it first passed forwards from the duct into xvi, and ended behind in xix. The vas 
deferens cannot be distinctly followed in its course on the body-wall; but it appears 
in segment xvii to be situated to the outer side of the prostatic duct, and I would 
