98 Memoirs of the Indian Museum. [Vonk Wal 
The setae in front of the clitellum are mostly very small; the ventral setae of 
xii—xvii are enlarged, and the interval ab is greater than bc ( =14bc). This relation 
between ab and bc is continued backwards for a considerable distance; there is no 
constant difference between bc, cd, de, etc. The numbers counted were :—16+16/v, 
16+17/xii, 15+15/xv, 16+16/xix, behind the clitellar region 1416, and18+109; at 
the end of the first third of the body 30, and in three segments near the posterior 
end of the body 28, 29 and 30. 
The male apertures, on segment xviii, are situated apparently (the actual pores 
being unrecognizable) on a pair of transversely oval papillae, placed towards the 
lateral parts of the segment, with their centres in or not far from the line of setae d. 
These papillae are connected across the middle line, the whole having the outline of 
an elongated dumbbell, and being surrounded by a darker area of corresponding 
shape. 
The female aperture is minute, single, on xiv, in the line of the setae. 
The spermathecal apertures are small, in 7/8 and 8/0, in line with setae d, or 
between d and e. 
In one of the two specimens there was a curious shifting back of all the genital 
apertures; the female to xvi, the male to xx, the spermathecal to grooves 0/10 and 
10/11; and the latter were in line with 5 or bc. 
Internal anatomy.—The gizzard is in v. 
The prostates (fig. 34) are small, confined to xviii; the septa are not bulged at 
all. The whole has a bushy appearance, since the gland is divided up into a large 
number of lobules, of various shapes from spherical to finger-shaped. The duct passes 
straight inwards; it is soft, slightly glistening, thin in its first and bulged in its ter- 
minal portion. 
The ampulla of the spermathecal apparatus (fig. 35) is a rather elongated oval. 
The duct is half as wide, and one and a half times as long as the ampulla. The 
diverticulum, full of glistening spermatozoa, and given off from the termination of 
the duct at the body-wall, is small, club-shaped, and half or less than half as long as 
the duct, alongside which it lies. 
Remarks.—Michaelsen has recently (12) redescribed this species, having had at 
his disposal more than 100 specimens belonging to 16 captures from 14 localities. 
Out of this number the longest specimen measured 415 mm. and consisted of about 
370 segments; these figures may therefore probably be taken to represent pretty nearly 
the extreme limits reached by that particular form. Consequently, when one out of 
two specimens here described exceeds the previous maximum length by nearly two- 
fifths, there is ground for supposing that we are dealing with a different variety, one of 
the distinguishing marks of which is a greater size. Other distinctions are to be found 
in the single female aperture (though this was originally stated by Fedarb for her 
specimens), shape of spermatheca, and smaller size of prostate; as well as, perhaps, 
the absence of a clitellum (though copulation had occurred, as evidenced by the glisten- 
ing mass of spermatozoa in the spermathecal diverticulum), the differing details of 
the male genital field, and larger number of setae in the hinder region. . 
