1916. ] J. STEPHENSON : Indtan Oligochaeta. 333 
Remarks.—-The present species seems to be related to M. 
tvavancorvensis, Mchlsn. (14). But though the characters of the 
male area in the latter are variable, it does not seem possible to 
reduce the condition in the present specimen to the same type. 
One has here, as so often, to regret that the form is represented 
by only a single specimen. 
Megascolex pumilio, sp. nov. 
Trivandrum, 11-1i-1911. Two mature specimens, one immature, and 
one fragment. 
External Characters.—Length 54 mm., maximum diameter 
14 mm. Colour an equable grey, clitellum a marked reddish 
brown. Segments 1009. 
Prostomium epilobous 4, tongue not delimited behind. 
Dorsal pores begin from furrow 5/6. 
For the greater part of the body there are twelve setae per 
segment. In front of the clitellum these are arranged in three 
pairs, the intervals bc and de being rather greater than ab, cd and 
ef. The setae a are in regular rows, one on each side, and the 
same is the case with z; the setae } form regular rows for the 
greater part of the length of the body, but ¢ does so only in the 
anterior part ; the row y is irregular. The dorsal interval is con- 
siderable; in front of the clitellum zz (or ff) is equal to about 4yz 
(or ef), behind the clitellum to about 3yz. 
The number twelve persists till near the hinder end of the 
body; but there 16, 17 and 18 are found, irregularly arranged 
and not in pairs. 
The clitellum extends over segments xiv—xvi=3; the situa- 
tion of the setae is shown by white dots on the brown-red back- 
ground. 
The ventral surface of segment xviii shows a transversely 
elongated thickened patch, extending from beyond the line } on 
the one side to a corresponding point on the other. The male 
apertures are only faintly indicated in or just outside b. 
A small white patch, circular and midventral, in the line of 
the setae of xiv, represents the female aperture. 
The spermathecal apertures are faintly indicated in the fur- 
rows 7/8 and 8/9, in line with setae bd. 
Internai Anatomy.—The anterior portion of the animal was 
cut into sections of 12, diameter. 
Septum 4/5 is very thin, 5/6 thin, 6/7 somewhat thickened, 
7/8, 8/9 and 9/10 considerably so; from 10/Ir to 14/15 they be- 
come progressively thinner again. 
The gizzard, in segment v, is of moderate size and thick- 
walled. The oesophagus, narrow in segment vi, is bulged seg- 
mentally from vii to xiv; there are no separate calcareous glands, 
but the epithelium is raised into villous processes or folds which 
extend inwards towards the centre of the lumen. The intestine 
begins in xv. 
