1015.] J. STEPHENSON : Indian Oligochaeta. 93 
Megascolex phaseolus, sp. nov. 
(Plate IX, figs. 28-29.) 
Parambikulam, 1700-3000 ft., Cochin State; 16—24-ix-1014 (F. H. Gravely). Three specimens, 
two incomplete posteriorly. 
External characters. —Length 180 mm., maximum diameter 3 mm.; colour grey, 
with a bluish tinge in parts; clitellum olive. Segments 270. 
Prostomium small, bent downwards into the opening of the mouth, proepilobous 
or epilobous +. 
Dorsal pores begin from groove 5/6. 
The setal rings are broken dorsally and ventrally. In the preclitellar region 
dorsally the setae were difficult to see; immediately behind the clitellum zz = 3yz, 
further back = 2yz, in the middle and hinder parts of the body =14yz. Ventrally the 
interval is small in front of the clitellum, —aa = 2ab or less; behind the clitellum and 
in the middle of the body aa = 4ab, and posteriorly rather less, about 3ab. The setae 
are closer together ventrally than dorsally and laterally, and in front of the clitellum 
those on the dorsal and lateral surfaces of the body are arranged in pairs, the pairs 
separated by a considerable interval. The numbers counted were:—34/v, 35/ix, 
36 (16+20}/xii, 38/xix, and 26—28 in the middle of the body. The intersetal inter- 
vals in the middle of the body are very irregular. 
The clitellum extends over xiv—xvii = 4; it is smooth, and limited by constrictions 
in front and behind; setae are not visible, but there is an indication of dorsal pores. 
The male genital field (fig. 28) is characterized by a kidney-shaped elevation (b) 
placed transversely across segment xvili, with its concavity directed backwards; this 
elevation is surrounded by a groove or valley, around which again is a more or less 
elliptical raised ring (w), with a cleft behind in the middle line, 7.e. behind the ‘ hilus’ 
of the kidney-shaped elevation; the ‘ring’ is narrower in front than behind. The 
whole area as described above takes up the length of segment xviii, and may slightly 
encroach on xvii; laterally it includes the whole of the ventral surface. 
The male apertures appear as oblique slits, or it may be little more than points, 
on the ring-like elevation, near the median cleft in the latter, and behind the con- 
cavity in the margin of the kidney-shaped cushion. From the apertures a groove may 
lead forwards and outwards, on one or both sides, crossing the valley between ring 
and included cushion, and ending on the latter. 
The female pore is single, just in front of the line of setae of segment xiv. 
The spermathecal apertures, in 7/8 and 8/g, are minute and close to the middle 
line, in a or between a and b. 
In one specimen only there was present on the anterior part of segment xix a 
median papilla (f, fig. 28), the posterior border of which was semicircular, and caused 
the line of setae to bend backwards; the anterior border, situated at groove 18/19, 
was flatter. 
Internal anatomy.—Septum 4/5 is present but very thin; 5/6 is also thin, 6/7— 
13/14 are all somewhat thickened. 
