330 Records of the Indian Museum. [Viorl Sain; 
The spermatheca (fig. 22) differs in some respects from the 
original description by Michaelsen (14) ; a comparison of the figures 
will render description unnecessary. 
Megascolex trivandranus, sp. nov. 
(Plate xxxii, figs. 25, 26). 
Trivandrum, 1911. [wo specimens, taken at different times. 
External Characters.—lLength 72 mm., diameter2mm. Colour 
in general an equable grey, with darker middorsal line; clitellum 
a teddish brown. Segments 136. 
Prostomium epilobous 4 to 4. 
Dorsal pores from furrow 5/6. 
The dorsal break in the setal rings is equal to 2-3yz. Ven- 
trally aa—=3ab, or it may be 4ab behind the clitellum. The inter- 
setal distances increase towards the sides, ab being distinctly the 
smallest. The numbers were :—36/v, 43/ix, 41/xii, 34/xix, and 
29 in the middle of the body. 
The clitellum extends over approximately xiv—xvli = 4, or 
ventrally $xiii—}xvii. Setae are easily distinguishable and dorsal 
pores are well marked. 
The male apertures are borne on small porophores on segment 
xviii; these are situated in be or c, at the ends of a transversely 
elongated depression, which, deepest at its ends, is slightly curved 
with its convexity forwards. ‘The depression is surrounded by a 
well marked whitish lip all round; in longitudinal extent the 
depression with its lips takes up the whole of segment xviii (fig. 
25). Inthe second specimen the transverse depression was prac- 
tically divided into two, its median portion being but little below 
the level of the general surface. 
The female area is a white oval patch on xiv, in which the 
actual apertures could not be discriminated. In breadth it extends 
over the interval bb, in length it takes up not quite the whole of 
the length of the segment. 
The spermathecal apertures, in furrows 7/8 and 8/9, are situa- 
ted on minute papillae just external to the line of setae 0. 
Internal Anatomy.—Septa 4/5, 5/6, 6/7 are very thin; 7/8 is 
slightly thickened, the succeeding ones up to 11/12 moderately, 
thence up to 15/16 progressively less so. 
The gizzard, of which one-third is contained in segment v and 
the rest in vi, is subspherical with a flattened anterior end. The 
oesophagus is segmentally swollen and dark in colour (z.e. vascular) 
in segments ix-xiv. The intestine begins in xvi. 
The last heart is in xiil. 
Behind the clitellum the micronephridia are arranged in a 
transverse row or band, just behind the septum in each segment, 
which does not attain the middorsal region. In segments xiv to 
xvi the arrangement is similar, but the individual nephridia are 
very considerably larger, with much more numerous coils; in 
