1915.] J. STEPHENSoN : Indian Oligochaeta. 89 
edly in segment vii, and which also possess testis-sacs. The possession of two pairs 
of spermathecae opening in 6/7 and 7/8 is noteworthy. 
Megascolex polytheca, sp. nov. 
(Plate VIII, fig. 25.) 
Kavalai, 1300—3000 ft., Cochin State; 24—27-ix-1914 (F. H. Gravely). Two specimens. 
External characters.—Length 160—250 mm., maximum diameter 34 mm.; colour 
a uniform grey except at the anterior end, which is darker with a purplish tinge. 
The anterior part of the body as far as segment xi is stout, firm and cylindrical; but 
the anterior half of the animal behind the genital segments is rather depressed, with 
a mid-dorsal groove. Segments (of the shorter specimen) 264; the setae on v—xi are 
implanted on raised circular bands,—especially so in the middle segments of this 
series, which have thus an indistinctly triannulated appearance. 
Prostomium proepilobous in one specimen; in the other epilobous 4, with the 
hinder end of the ‘tongue’ open, but an indication of a transverse groove at the front 
end of the tongue. 
Dorsal pores begin in groove 4/5. ; 
The setal rings are almost closed dorsally; in front of the genital region zz=11yz 
on the average; behind, zz—14yz or the ring may be quite closed. Ventrally the 
interval is larger; in front of the genital region aa=3ab, behind the male apertures 
' = 4ab, or further back as much as 5ab; ab > bc. Setae a and bare in regular longitudi- 
nal lines, and are larger than the other setae; c, d, and e may also be arranged in 
fairly regular lines behind the genital region. The setae of the preclitellar region are 
smaller and more numerous than those behind; the numbers counted were 54/ix- 
53/xiii, ca. 46/xix, and 46—48 more posteriorly. 
No clitellum was distinguishable. 
The male apertures, in xviii, are situated on circular white papillae which take 
up nearly the whole length of the segment; the pores themselves are in dc. 
Female apertures were not distinguished. 
The spermathecal apertures, in grooves 7/8 and 8/9, are numerous. On separa- 
ting the lips of the groove a row of white points, 6—9 in number on each side, are 
seen; these begin internally between the lines b and c, the intervals between the suc- 
cessive points are rather greater than the intersetal intervals. Each white dot 
corresponds to a spermatheca, is of an opaque glistening appearance, and is surrounded 
by a small darker area. The actual numbers in each row were 6, 8, 8 and 9. 
Internal anatomy.—The shorter specimen was dissected, as being possibly more 
mature. Septum 4/5 seems to be represented, though very delicate; 5/6 and 6/7 are 
slightly thickened, 7/8—11/12 considerably so (7/8—9/10 most of all), and the follow- 
ing one or two are slightly thickened. 
The barrel-shaped gizzard is in segment v. There are no calcareous glands; the 
oesophagus is dilated, deep yellow, and vascular in xii, and there are similar but 
rather smaller swellings in xiii and xiv; all are marked by large transversely directed 
