Class VI. NEREIS. 93 



GENUS XX. NEREIS. 



Body long, slender. 



Feet formed like a pencil of rays, and nume- 

 rous on each side. 

 Mouth at the extremity, unguiculated. 

 Feelers above the mouth, simple. 



N. segmentis xxiii. corpore Noctiluca marina. Amaen. A- 1. Nocti- 



vix conspicuo. Lin. Syst. cad. luca. 



„ r . -r. i . Noctilucent. 



1085. Gm. Lin. 3115. Baster, i. tah. iv. Jig. 3. 



These are the animals that illuminate the sea, 

 like glow-worms, but with brighter splendor. 

 I have at night, in rowing, seen the whole 

 element as if on fire round me ; every oar 

 spangled with them ; and the water burnt with 

 more than ordinary brightness. I have taken 

 up some of the water in a bucket, seen them 

 for a short space illuminate it; but when I 

 came to search for them, their extreme small- 

 ness eluded my examination. 



Nereis. Lin. Syst. 



1086. 



t 



Faun. Suec. No. 20Q5. 



2. G/ERCLEA 



Gm. Lin. 3117. 







Blue. 



N. smooth ; depressed ; with 1 84 segments of 

 a bluish-green color, semi-pellucid; a longitu- 



