Dr. Johnston's /nt/eo? to the British Annelides. 457 



2. Nereis margarita, Montagu, Linn. Trans, vii. 82. Penn. Brit. 

 Zool. iv. 94. Turt. Brit. Faun. 135. 



3. Nereis lineata, Montagu, Linn. Trans, vii. 83. Penn. Br. ZooL 

 iv. 95. Turt. Br. Faun. 135. 



4. Nereis maculosa, Montagu in Linn. Trans, xi. 21. pi. 3. fig. 4. 



5. Nereis ru/a. 



Nereis rufa, Penn. Brit. Zool. iv. 96.pl. 27. fig. 2, 3. Hogg's Stock- 

 ton, 29. 



6. Nereis mollis. 



Nereis mollis, Linn. Syst. 1085. Turt. Gmel. iv. 86. Jameson in 

 Wern. Mem. i. 557. Penn. Br. Zool.iv. 96. Bosc, Vers,i. 168. 



7. Nereis octentaculata. 



Nereis octentaculata, Montagu in Linn. Trans, vii. 84. Penn. Brit. 

 Zool. iv. 95. Turt. Brit. Faun. 135. 



8. Nereis punctata. 



Nereis punctata, Encyclop. Method. Vers, tab. 56. fig. 19j 20 ! 



Desc. Body x%ths long, ^th broad, linear, nearly equal at both extremi- 

 ties. Back rounded, brown, marked with three rows of light-coloured cir- 

 cular spots arranged longitudinally, and with eight similarly coloured trans- 

 verse lines placed at unequal distances. The middle series of these spots 

 is the faintest ; and besides the three dorsal there is another series on each 

 side placed on the foot-like processes. Head small, quadrangular, corneous,^ 

 pale, with four black eyes, two on each side and approximate. Anterior 

 margin of the head furnished with five conical setaceous two-jointed tenta- 

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

 rior. Mouth terminal, with a large projectile proboscis unanned 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. Ventral 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. 1 had no doubt of its 

 being the Nereis punctata figured in the work referred to, but it is not the 

 Nereis punctata of MuUer. The species is not noticed by Audouin and 

 Milne-Edwards ; nor am I able to refer it to any defined genus. 



Syllis. 

 Syllis, Savigny in Cuv. R^g. Anim. iii. 203. Lam. Anim. s. Vert. 

 V. 317. Aud. and M. Edw. Litt. de la France, ii. 204. (Vide Ann. 

 Nat. Hist. xiii. p. 235.) 



1. S. armillaris. 



Nereis armillaris. Mull. Wurm. 150. tab. 9. fig. 1-5 ; copied in En- 

 cyclop. Method, pi. 55. fig. 13-17. Turt. Gmel. iv. 86. Bosc, 

 Vers, i. 1 68. Johnston in Ann. and Mag. Nat. Hist. xv. 145. pi. 9. 

 fig. 1,2. 



2. S. proli/er'a. 



Nereis prolifera, Mull. Zool. Dan. ii. 15. tab. 52. fig. 5-9 ; copied 



