PHYLLODOCE. 177 



(a) Black Rock, Firth of Forth, Leach. 



(b) Berwick Bay, Dr. Johnston. 



(c) Falmouth. 



(d) South Devon, G. Montagu. 



Plate XVI. Fig. 1. Phyllodoce lamelligera, of the natural size. 2. The 

 head and proboscis, as this appears when half extruded, magnified. 

 3. The proboscis fully protruded. 4. Two segments magnified. 

 5. A lateral view of the foot reversed. 6. The setigerous papilla with 

 its bristles and spine. 



2. Ph. bilineata, head twice as long as broad, rounded in front ; 

 tentacular cirri three times the length of the diameter of the body, 

 which is a pale greenish-yellow, with a continuous dark line down 

 each side, sinuous at the insertions of the feet ; segments nearly 

 similar ; dorsal cirrus ovate or elliptical ; the ventral papillary. 

 Length 1-3". Plate XVI. fig. 7-10. 



Phyllodoce bilineata, Johnston in Ann. Nat. Hist. iv. 227. pi. 6. f. 7-10. 

 Grube, Fam. Annel. 56. 



Hab. The littoral and laminarian regions. 



Desc. From 2 to 3 inches long, very slender, serpentine, somewhat 

 narrowed in front, more so towards the tail, of a pale greenish-yellow 

 colour, with a dark continuous line along each side, rendered sinuous 

 by the emarginations at the junction of the segments, which are 

 numerous and quadrangular. Head ovoid. Eyes two, placed back- 

 wards. Antennae four, unequal, placed in a stellate fashion round 

 the orifice of the mouth. Tentacular cirri rather short, unequal. 

 Branchial lamellae ovate or elliptical, smooth, veined ; the inferior 

 cirrus short and papillary, not extending beyond the apex of the 

 foot, which is slightly emarginate, and armed as usual with a brush 

 of slender jointed bristles and a single spine. 



Obs. In a description of a Phyllodoce, which is evidently identical 

 with my bilineata, Mr. Dyster says that there are five antennae, the 

 posterior one "very minute." In specimens not exceeding an inch 

 in length, the same accurate observer counted 160 segments. There 

 are two eyes. 



Plate XVI. Fig. 7. Ph. bilineata, natural size. 8. The head. 9. The 

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



3. Ph. maculata, the body marked with dark brown spots in three 

 rows, three on every segment ; head longer than broad, rounded in 

 front ; tentacular cirri three times longer than the diameter of the 

 body ; foliaceous cirrus broadly ovate, somewhat stalked. Length 4". 



Nereis maculata, Linn. Syst. 1086. Miill. Zool. Dan. Prod. 217. 

 Bosc, Vers, i. 171. 



N 



