228 Dr. Johnston on the British Nereides. 



mellce ovate or elliptical, smooth, veined ; the inferior cin'us 

 short and papillary, not extending beyond the apex of the/bo/, 

 which is slightly emarginate and armed as usual vi^ith a brush 

 of slender jointed bristles and a single spine. 



Plate VI. fig. 7. Ph. hilineata, natural size. Fig. 8. The head. Fig. 9. 

 The middle segments; and Fig. 10. The caudal extremity: — magnified. 



4. Ph. viridis, body roundish, of a uniform grass-green co- 

 lour ; branchial leaflets lanceolate ; antennae five. Plate VI. 

 fig. 11—15. 



Nereis viridis, Linn. Syst. 1086. Mull. Zool. Dan. prod. 21 7, wo. 2636. 



Fabric. Faun. Groenl. 297. Turt. Gmel. iv. 88. 'Furt. Brit. Faun. 



135. Adams in Linn. Trans, v. 8. Bosc, Vers, i. 171. Pen. Brit. 



Zool. edit. 1812, iv. 94. — Phyllodoce clavigera, Aud. et Edw. Hist. Nat. 



du Litt. de la France, ii. 226. pi. 5 a. fig. 9 — 13. 



Hah. Found on Fucus pinnatifidus, near Tenby (Pembrokeshire), Adams. 



Berwick Bay abundantly, and I believe it to be common on most parts of 



the British coast. 



Desc. Worm from 2 to 3 inches long, elongate and narrow, 

 slightly tapered towards the head, more so at the tail, of a 

 uniform duck-green colour, paler on the ventral aspect. Head 

 small, narrowest in front, but not pointed, the apex armed 

 with four short conical antennce^ and a smaller antenna is less 

 perceptible on the vertex : eyes two*, occipital, dark brown : 

 mouth with a large clavate proboscis, greenish, rough under 

 the magnifier, with minute papillae, edentulous : post-occipital 

 segment with four tentacular cirri on each side, twice the 

 length of the branchiae, the anterior pair one half shorter than 

 the others, conical, simple: segments very numerous, often 

 defined by a line of deeper green, shorter than their breadth, 

 smooth, convex dorsally : branchial leaflets (or superior cirri) 

 lanceolate, slightly compressed, retroflexed, longer than the 

 foot, which is furnished with a bundle of very slender retract- 

 ile acicular bristles and with a single spine : tail terminated 

 with two fleshy styles, similar to the leaflets, but rather larger. 

 P. viridis lives under stones, or in the crevices of slaty 

 rocks, between tide marks; but it abounds most near low- water 

 mark, nor is it uncommon among the corallines and shells 

 that are never left uncovered by the tide. It is an active spe- 



* Audouin and Edwards say four, disposed in a transverse line, and very 

 snial), but their (igure shows two only. 



