ROSTRATED N A I S. 
* 
Generic Character. 
Body repent, long ? linear, pellucid, deprefted. 
Feet confifting of fimple briftles. 
Tentacula none. 
Eyes two, or none. 
Specific Character, &c. 
NAIS with fingle lateraj briftles, and long pro- 
bofcis. 
Long-fnouted NAIS. 
The Probofcis WATER-WORM. 
Tremblcy. hijl. polyp . t. 6 . 
Schaff. armpolyp. 1754. t. 3. 
Roc/, inf. 3. p. 483. /. 78, &c. 
This fpecies, which rarely exceeds the length of 
about three quarters of an inch, is a native of clear 
ftagnant waters, in which it is not uncommon during 
the fummer months, and is remarkable for the hid¬ 
den and violent contortions into which it frequently 
throws itfelf, while its more general motion is 
fmooth and fomewhat languid. As a fpecies it is 
clearly diftinguilhed from others of this genus by 
the 
