68 Memoirs of the Indian Museum. [Vor. VI, 
Megascolides pilatus, sp. nov. 
(Plate VII, fig. 12.) 
Parambikulam, 1700— 3200 ft., Cochin State; 16—-24-ix-1914 (F. H. Gravely). A single speci- 
men, incomplete posteriorly. 
External characters. —Length 123 mm.; diameter 4 mm.; colour grey, mottled 
bluish or slaty in places, anterior end lighter, not pigmented. Probably the mottling, 
here and elsewhere, which occurs in rather badly preserved specimens, is due to the 
earth in the alimentary tube appearing through the thinned walls. Segments not 
counted; viii is biannular, and a number of succeeding segments triannular,—perhaps 
originally all, but the present specimen is much softened. ; 
Prostomium not distinguishable. 
First dorsal pore in groove I1/12. 
The setae are paired; but anteriorly the lateral setae almost or quite lose the 
paired character, the interlateral being equal to the ventro-lateral setal interval. 
Thus near the anterior end aa=2ab; bc is only slightly greater than cd, which in turn 
is slightly greater than ab; in front of the male pores aa—3-4ab, bc—2-3ab—2cd ; 
behind the male pores the setae are very small, aa—6-7ab, bc=3ab=2cd. 
The clitellum was not distinguishable. 
The male apertures are situated on small porophores on segment xviii in the 
line ab. An oval thickened area, slightly marked, takes up the whole of the ventral 
surface of xviii, extending laterally almost to the line of setae c, and posteriorly 
encroaching slightly on to the anterior part of xix. The level of the male apertures 
is slightly behind the middle of the length of segment xviii, so that the thickened 
area is symmetrical with regard to the male apertures. 
The female apertures, with difficulty distinguishable, are apparently just in front 
of the level of the setae of xiv, on the anterior part of the second of the three annuli 
of the segment; they are paired, and their positions divide the interval aa into three 
equal parts, so that a2 =? 9 —9 a. 
The spermathecal apertures are represented by minute papillae in grooves 7/8 
and 8/0, in the line a. 
Internal anatomy.—The whole of the internal organs were much softened. Sep- 
tum 5/6 is thin, septa 6/7—12/13 probably originally considerably thickened, 13/14 
less so, 14/15 perhaps slightly so, the rest thin. 
The gizzard is large and spherical, in v. Calcareous glands are present, four pairs 
in segments x—xiii; they are rather bean-shaped, flattened antero-posteriorly, and 
embrace the sides of the oesophagus, to which they are attached only at their vent- 
ralends. The attachment takes place by a narrow stalk which joins the oesophagus 
where it comes through the anterior septum of the segment. The hearts are applied 
to the outer convex edges of the glands. 
The intestine begins in xvi. 
The last heart is in xiii. 
Micronephridia are present as considerable tufts by the side of the alimentary 
tube in certain of the anterior segments; elsewhere they are numerous and small, 
TT ee hs nt mins i aa 
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