304 - Records of the Indian Museum. [VoL 22cm 
would limit the length of the hair setae of S. lacustris to, at most, 
a little more than the diameter of the body. 
The present specimens have no resemblance to S. lomondi, 
Martin (8). 
Gen. Pristina. 
Pristina longiseta, Ehrbg. 
Aquarium, Elphinstone College, Bombay, 26-ii-1913 (S. P. Agharkar). 
A few small specimens, along with some examples of Aulophorus 
(v. inf.). 
Pristina aequiseta, Bourne. 
Allahabad, Jumna River, 10-1-1g09 (A. D. Jmms). A number of speci- 
mens. 
The specimens correspond with the Nazdium tentaculatum of 
Piguet (17). This author has however (18) more lately united the 
Swiss species with the Pristina aequiseta of Bourne’(3). This is not 
accepted as beyond doubt by Michaelsen (13), who denotes Piguet’s 
species as “‘ P. tentaculata, Piguet (2? < P. aequiseta, Bourne).’’ 
Gen. Aulophorus. 
The collection under review contains specimens of Aulophorus 
from two localities,—a hot spring at Khed, and an aquarium in 
Elphinstone College, Bombay. Before assigning them to their 
position in the genus, I wish to make a few remarks on them, and 
to indicate the conclusions which it is possible to draw. 
In the specimens from Khed, besides the palps, there were 
three pairs of gills, all about the same size, arising from within 
the margin of the funnel ; the dorsal margin of the funnel projected 
backwards slightly as an indented prominence, which was apparent- 
ly not gill-like (pl. xxx, fig. 3). In one specimen examined, how- 
ever, the dorsalmost of the three gills, though of large size, seemed 
to be continuous with the margin of the funnel, —to be itself the 
folded margin, in fact. It may be noted also that in the specimen 
from which the figure is taken the anterior gill on the right side is 
almost completely continuous with the margin of the funnel. 
In the specimens from Bombay, there are three pairs of gills, 
decreasing in size anteriorly, all separate from and within the 
margin of the anal funnel. The dorsal margin of the funnel has 
the form of a straight edge, without projections, and is not gill- 
like (this was confirmed by sections). In one specimen however 
the dorsal lip projects slightly,—according to my original notes, 
not unlike what is described for A. stephensont, Mchlsn., where there 
is a gill-like projection on each side (v. inf.). 
Now let us consider the following series of forms :— 
(1) Aulophorus furcatus.—-Two pairs of gills, with one pair of 
accessory gills, the latter being the dorso-lateral project- 
ing margin of the funnel; when the funnel is fully 
