Ig10. |} J. STEPHENSON : Indian Oligochaeta, 321 
The excretory system is meganephric. 
Testes and funnels are free in segments x and xi. 
The vesiculae seminales, in xi and xii, are single in each seg- 
ment, large and conspicuous, placed dorsally over the alimentary 
tube and dorsal vessel. 
The prostate, small and confined to segment xviii, is of the 
Pheretima type. The duct is soft, white, comparatively narrow 
and of the same diameter throughout; it has a straight course, 
passing transversely inwards. 
Ovaries and funnels have the usual situation. 
The spermathecae, in segments vii and viii, are simple small 
sacs of ovoid form. ‘The duct is short and stout and not marked off 
from thé ampulla. There is no diverticulum. 
The penial setae (fig. 14) are in length 92 mm., in thickness 
at the middle of the shaft 301. The point is blunt, the shaft is 
straight and without any proximal bend; the tip is ornamented 
with about fourteen rows of very minute sculpturings. 
Remarks.—The present species shows a certain amount of 
similarity to the last, from which however it is distinguished by its 
greater size, more numerous setae, and the characters of the male 
genital area. The paucity of external markings is remarkable. 
Perionyx parvulus, sp. nov. 
(Plate xxxi, fig. 15). 
Near Ghoom, E. Himalayas, ca. 7000 ft., 16-iv-19g11 (.V. Annandale). 
A single specimen. 
External Characters.—Length 23 mm., maximum breadth 2 mm. 
Colour dorsally a light brown with slight purplish tinge, clitellum 
rather paler; ventrally a pale grey. Segments 75. 
Prostomium relatively large and prominent, epilobous 3. 
Dorsal pores from furrow 4/5. 
The setal rings show a small dorsal break, equal to or less than 
2vz. The ventral break is very small,—little more than the ordinary 
distance between two setae. No setae are specially enlarged, and 
there are no considerable differences among the intersetal intervals. 
Near the middle of the body the number is about 40 per segment. 
The clitellum, distinguishable only by its colour and only on 
the dorsal surface, extends over xiv—xvii. There is some modi- 
fication of segment xiii also. 
The male apertures, transverse and slit-like, are on segment 
Xvill,-with their centres opposite the interval cd. The lips of the 
apertures havea slightly whiter appearance. The interval between 
the slits is rather greater than the length of each slit. The setae 
of xvili begin with / or g outside the region of the slits. 
The female aperture is single, between the setal row and the 
anterior margin of segment xiv. 
The spermathecal apertures are small, in 7/8 and 8/9; six 
setae intervene, so that the distance between them is about equal 
to that between the male pores. 
