SPECIES INaUIREND^. 281 



cula, two on each side, and one in the centre, which is the shortest 

 and inferior. Mouth terminal, with a large projectile proboscis un- 

 armed with any teeth. Feet forty on each side. Each foot is divided 

 at the apex into two processes ; the superior terminated with a very 

 long setaceous filament, and furnished with a retractile brush of fine 

 hairs ; the inferior has three short setaceous filaments, and a large 

 brush of equally fine hairs. The filaments are not retractile. Ven- 

 tral surface brownish. Tail abrupt, terminated with two setae like 

 the lateral filaments. Anus terminal. 



This is a beautiful worm, and often glows with a metallic lustre of 

 a light blue reflected from its pale spots. Its motions are very rapid. 

 I have seen only one specimen, and this was many years ago. I 

 had no doubt of its being the Nereis punctata figured in the work 

 referred to, but it is not the Nereis punctata of Miiller. The species 

 is not noticed by Audouin and Milne-Edwards ; nor am I able to 

 refer it to any defined genus. 



9. N. noctiluca. 



Nereis noctiluca, Linn. Syst. 1085. Turt. Gmel. iv. 86. Penn. Brit. 

 Zool. iv. 46, and edit. 1812, iv. 93. Turt. Brit. Faun. 134. Stew. 

 Elem. i. 390. Abildgaard in Zool. Ban. iv. 31. tab. 148. f. A. 1-3. 

 And. ^ M.-Edw. Litt. de la France, ii. 209. Dalyell, Pow. Great. 

 ii. 161. 



There is mention made of the luminous worm in the oyster in 

 Act. Acad. Nat. Cur. 1670, p. 309. 



10. N. pinnigera. 



Nereis pinnigera, Montagu in Linn. Trans, ix. 111. tab. 6. f. 3. Penn. 

 Brit. Zool. iv. 95. And. Sf M.-Edw. Litt. de la France, ii. 219. 



APHRODITA. 



1 . A. annulata. 



Aphrodita annulata, Penn. Brit. Zool. iv. 45. pi. 24. f. 28. 



2. A. minuta. 



Aphrodita minuta, Penn. Brit. Zool. iv. 45. pi. 24. f. 29. 



1 . S. seticornis. 



SPIO. 



Nereis minima tentacuUs longissimis. Bast. Opusc. Subs. ii. 134. 



tab. 12. f. 2. 

 Spio seticornis, Turt. Gmel. iv. 81. Turt. Brit. Faun. 137. Penn. 



Brit. Zool. iv. 92. Stark, Elem. ii. 138. Dalyell, Pow. Great, ii. 



159. pi. 20. f. 22. 



Perhaps a species of Leucodore ! But see Oersted, Consp. 40. 



