1916. | J. STEPHENSON : Indian Oligochaeta. 331 
xii the row is very short and consists of one or two large tufts 
only. In front of the clitellum there are no nephridia on the body- 
wall; but in each segment by the side of the alimentary canal 
there is a considerable stalked tuft with numerous branches. The 
first tuft of the series is a large one connected with the hinder 
angle of the pharynx. 
The male funnels are free in segments x and xi; testes were 
not identified. 
The seminal vesicles depend from septa 10/rr and 11/12 into 
segments xi and xii. They are racemose and not large; those in 
xii however are larger than the anterior pair. 
The prostates, small and confined to segment xviii, are of the 
Pheretima-type, and are made up of small closely compacted lob- 
ules. The relatively stout duct passes transversely inwards; it is 
thinner at its ental end and gradually widens. 
The ovaries are in xiii, and in xiv there are small struc- 
tures which may be minute ovisacs, or possibly only nephridial 
tufts. 
The spermathecal ampulla is smooth, regularly ovoid, and of 
an opaque white colour. The duct is relatively stout, half as 
broad and two-thirds as long as the ampulla. There is a very 
long diverticulum, two-thirds as long asampulla and duct combined ; 
it is a coiled and twisted tube which takes origin from the ter- 
mination of the duct and at its free end is dilated into a small 
spherical chamber with a simple cavity (fig. 26). 
There are no penial setae. 
Megascolex pentagonalis, sp. nov. 
(Plate xxxii, figs. 23, 24). 
Trivandrum, 24-vi-rgtr. A single specimen, incomplete posteriorly. 
External Characters.—Length 108 mm.+, diameter 3 mm. 
Colour a uniform medium grey. Segments 94+; vii, viii and ix 
with three or four secondary annuli. 
The anterior end of the animal is truncated, not tapering; 
the prostomium is seen on looking at the animal from the front; 
it is small and triangular, the pointed posterior angle being direc- 
ted upwards. 
The first dorsal pore is in furrow 5/6. 
The ventral setal interval is equal to 2ab (in front of the 
clitellum), or 24ab (behind it). The ventral setae are in fairly 
definite longitudinal lines; those on viii and ix are remarkably 
small. The dorsal setae are not in definite lines, and the dorsal 
break is large; thus it is 4—5yz in front of the clitellum, 6yz or 
even 8yz posteriorly. The numbers were:—14/v, 16/x, 6+8/xii, 
7+6/xix, 9+ 10/xxii, further back 10+10 or 10+12; at the pos- 
terior end of the (incomplete) specimen there were 32, all setae 
were at irregular intervals, and the dorsal break was much smaller, 
=2yz only. 
