306 Records of the Indtan Museum. [Vortec 
but sometimes the distal was shorter than the proximal, and very 
fine. ‘The position of the nodulus is known to vary in setae of the 
same bundle in A. stephensoni (21), as well as in A. furcatus (24). 
I have made a careful comparison of the setal and other 
characters of all the forms tabulated above ; and I have come to 
the conclusion that the differences, such as they are, cannot be 
used for purposes of discrimination between them. They are of 
the same order as the differences of which examples have just been 
given, and therefore fall within the limits of individual variability. 
As tothe outlying term of the series, A. falustris, the setal and 
other characters here also allow of no distinction. The gap 
between it and its next neighbour, in regard to the gills, is how- 
ever fairly well marked, and it may therefore be allowed for the 
present to retain the distinction of a separate specific name. 
A. stephensoni, however, must disappear, and it is probable that 
A. palustris will eventually have to follow it. 
Aulophorus furcatus (Oken). 
(Plate sexx, fiei3): 
Aquarium, Elphinstone College, Bombay, 26-11-1913 (S. P. Agharkar). 
Several specimens. 
Hot spring at Khed, Poona Dist., 31-x-1912 (S. P. Agharkar). Numer- 
ous specimens. 
Some of the specimens from Bombay were sexual, though 
perhaps not quite fully mature (apparent absence of female 
funnels). However, the individuals which were examined by 
sections had already copulated (presence of spermatozoa in the 
spermathecae). 
The clitellum extends from the anterior end of segment v 
back to the middle of vii (=24). This region is not thickened, 
and is not distinguishable except in sections. I would not say 
that I definitely identified the testes and ovaries in segments v and 
vi respectively ; there may have been some confusion with the 
ganglion cells of the ventral nerve cord. 
Many developing spermatozoa were free in v. The spermsac, 
as usual a backwardly directed diverticulum of septum 5/6, extends 
back to the hinder end of vii. 
The male funnels are cup-shaped, near the middle line, close 
together, indeed apparently continuous with each other. They 
look upwards and backwards, and are placed in the mouth of the 
spermsac; thus, though morphologically in v, they appear at first 
sight to be in vi. The vas deferens runs on septum 5/6 downwards 
for a short distance, and enters the anterior face of the atrium. 
The atrium, in segment vi, is small, subspherical, and in the 
specimens examined contained ripe spermatozoa. Its wall is com- 
paratively thin; its lining epithelium is cubical, and there is no 
covering of prominent peritoneal cells. The ejaculatory duct is 
short and somewhat invaginated upwards into the atrium ; a thick 
cluster of cells surrounds it. The aperture is on segment vi. 
