238 Records of the Indian Museum. [VoL. V, 
slightly swollen near its base ; the proximal prong was more than 
twice as thick as the distal. The nodulus was distinctly distal to 
the middle (proportions varying,—proximal : distal :: II : g or 
8 : 7), and was slightly more prominent on the side of the shaft 
corresponding to the distal prong. (Fig. 20.) 
The number of the ventral setae per bundle was either three 
or two throughout. 
The dorsal setae were of two kinds, hair-setae and needles. 
The hair-setae were somewhat shorter than the diameter of the 
animal. The needles projected very little from the surface, and 
were in length 54—56 ». The shaft was straight, except for a very 
slight curve in its distal portion; its extremity was very finely 
double-pointed. The nodulus was rather a slight angle on one 
border of the shaft than a definite swelling; it was situated at the 
junction of the distal and middle thirds. (Fig. 2c.) 
The dorsal bundles consisted always of one hair and one 
needle. 
Nats communis, Piguet, var. caeca, n. var. 
These forms were more numerous than those with eyes, with 
which, for the rest, they closely correspond. 
The length was about the same. Segments 24—27. In one 
example the dorsal setae began on segment v, in the rest on 
segment vi. 
The ventral setae were in bundles of 2 or 3 throughout. In 
segments ii—v they were 80, 90, or 94 » in length, the shaft 
possessing a slight double curve, and a thickness estimated as 
about ? of that of the setae in the more posterior segments. The 
distal prong had a slight swelling near its base, and was 14 times 
as long as the proximal, which latter was 143—1% as thick. The 
nodulus was more prominent on the side corresponding to the 
distal prong, and was situated proximally to the middle point of 
the shaft (proximal to distal 8 : g org: 10). (Fig. 3a.) 
In segments from vi onwards the length of the ventral setae 
was 71, 81 or 87 » ; the shaft was thicker and more strongly curved 
than in the anterior segments; the distal prong equal to the 
proximal in length, or very slightly longer, but only half, or even 
less, as thick at its base. ‘he nodulus, more prominent on the 
side of the distal prong, was distal to the middle, but its exact 
position was somewhat variable (proximal : distal :: 8 : 6, or 
EO) cB Or, TOGO) ea Rie 30.) 
The dorsal setae were regularly one hair-seta and one needle 
per bundle. The hairs were in length equal to about ? the 
diameter of the (preserved) animal’s body. ‘The needles were in 
length 53—58 v, with a shaft in which a very slight double curve 
might or might not be recognizable. The extremity was finely 
bifurcate, the prongs short, equal in length, one thicker than the 
other at the base. The nodulus, a slight fusiform swelling, was 
distally situated (distal : proximal :: 4 : 13). (Fig. 3c.) 
I subjoin, for purposes of comparison, a description of the 
