DIGITATED NAIS. 
v 
Generic Character. 
Body repent, long, linear, pellucid, depressed. 
Feet consisting of simple bristles. 
Tentacula none. 
Eyes two or none. 
Specific Character, &c. 
NAIS with single lateral bristles and laciniated 
tail. 
DIGITATED NAIS. 
Finger-tailed Water-Worm. 
This animal may be considered as one of the 
rarer species of its genus, and is readily distinguish¬ 
ed by the remarkable form of the tail. It is nearly 
equal in size to the Nais proboscidea, and may be 
found in stagnant waters towards the decline of 
fummer. The processes or tentacula at the end of 
the tail may be either retracted or extended at plea- 
fure, and when at their utmost extent, while the 
fore part of the body is attached to the stalk of 
some water plant or other object, the animal has so 
much the appearance of a slender Hydra or Polype, 
that it might easily, at first view, be mistaken for 
such. 
