THE 
SERPENTIFORM NAIS. 
Generic Character. 
Body repent, long, linear, pellucid, depreffed. 
Brijiles on each fide, inftead of feet. 
Tentacula none. 
Specific Character, &c. 
PELLUCID SNAKE-LIKE NAIS, with red 
fpiral inteftine and triple black collar. 
The COLLARED WATER-WORM. 
The SNAKE NAIS. 
The genus Nais confifts of fmall animals, which 
in general are natives of frellr waters : fome fpecies 
are not to be diftincfily examined without the affif- 
tance of glalfes: amongft thefe is the animal here 
reprefented, both in its natural fize, and as it ap¬ 
pears when magnified : it is not uncommon in ftag- 
nant waters. 
