1916. ] J. StrePHENSON : Jndian Oligochaeta. 301 
specimen not a single dorsal seta is found perfect. In some cases 
nearly the whole of the dorsal setae may actually be broken off 
level with the body-wall, scarcely one being left projecting ; so that 
I was for a time misled, in the examination of one of the present 
specimens, into thinking that I had before me one of the genera 
which are without dorsal setae. But even where the ends of the 
setae of one single segment are alone damaged, it may be difficult or 
impossible to discriminate, for example, such forms as Pristina 
longiseta from the other species of its genus. 
Thirdly, there is frequently more than one species represented 
in a limited amount of material ; and there is naturally the liability 
to confusion, especially if some of the specimens are fragmentary. 
Confusion may easily result if, in order to get a complete description, 
one specimen is used for the dorsal, another for the anterior ven- 
tral, and a third for the posterior ventral setae, according as they 
happen to be well shown in one or other specimen ; additional 
specimens have frequently to be taken for a description of the 
process of budding, or perhaps for the internal organs. It is prac- 
tically impossible ever to write a complete description from a single 
specimen, 
I thus spent much time over a tube of eight small worm 
from Bhim Tal. Besides two specimens that I can say nothing 
definite about, there was one specimen of a Nats without eyes ; 
three of a Slavina which I describe shortly below, but which I do 
not feel justified in naming; and two of a Stylaria which seems to 
to me to require specific distinction. 
Gen. Slavina. 
Slavina sp. 
(Plate xxx, fig x). 
Bhim Tal, 4450 ft., Kumaon, W. Himalayas, 2—10-v-1911 (S. W. Kemp). 
Three speeimens, one considerably damaged. 
Length 5-5°5 mm., diameter about °25 mm. Segments 47 or 48, 
with a small undifferentiated zone at the hinder end. No zone of 
budding. A considerable amount of debris adherent to the surface. 
Prostomium blunt. No eyespots. 
The anterior ventral setae are in length 135, in thickness 
3u. The proximal prong of the fork is almost equal in length to 
the distal, but is twice as thick, and this on the whole is much the 
more massive of the two; the distal prong is slightly claw-like. 
he curve of the shaft at its proximal end is slight; the nodulus 
is proximal to the middle point of the shaft, the relation between 
the segments of the shaft proximal and distal to the nodulus 
respectively being 2 : 3 or 3:5. There may be up to four setae 
per bundle (fig. r). 
Behind the first few segments the ventral setae are not very 
different from those just described. The length is rather less, 125p, 
