180 PHYLLODOCIDiE. 



Plate XVI. Fig. 11. Ph. viridis, of the natural size. 12. The head and 

 anterior segments magnified. 13. The head and proboscis extruded. 

 14. The middle segments seen from below. 15. The caudal extre- 

 mity. 



5. Ph. ellipsis, body marked transversely with regular dark fasciae 

 at the sutures ; segments alike and equal ; head semioval, rounded 

 in front ; posterior tentacular cirri elongated ; eyes two ; foliaceous 

 cirrus elliptical. Length 2^" ; breadth ^"'. 



Nereis ellipsis, Dalyell, Pow. Great, ii. 152. pi. 20. f. 7-10. 



Hab. Shores of Scotland : rare. 



Obs. "Colour greenish to the eye. The microscope discovers 

 two double dark belts crossing the back, on a greenish-yellow broader 

 predominant line." — Dalyell. 



6. Ph. GrifiRthsii, straw-colour, with two interrupted brown fasciae 

 across each segment ; segments alike and equal ; head semielliptical, 

 rounded in front ; tentacular cirri longer than the diameter of the 

 body ; dorsal cirrus lanceolate, the ventral a roundish papilla ; eyes 

 two. Length 8-18'". 



Hab. The littoral region. 



Obs. Body slightly attenuated at the head, and more so towards 

 the tail. One ^^ths in length had 100 segments. The bands across 

 the segments are darker at the middle and edges, so as almost to 

 become spots. Eyes two, small. There are five antennae, and four 

 pairs of tentacular cirri, the first pair attached to the first segment, 

 the second and third pairs to the second, and the fourth pair to the 

 third segment. The dorsal cirrus is much larger than the ventral, 

 which is roundish. The setigerous tubercle and setae are inconspi- 

 cuous from the back ; and there is a single spine to each foot. — 

 F. B. Byster. 



The specimens which I refer to this beautiful species have had 

 their markings discharged by the spirits in which they are pre- 

 served ; and now resemble in colour, as in form, the Geophilus mari- 

 timus. A specimen 1^" long had about 130 segments. The branchial 

 cirrus is very accurately lanceolate-acute, and beautifully veined like 

 a leaf, with a midrib reaching the point. The proboscis is one-third 

 the length of the body, papillose. 



{a) Torbay, J. R. Griffiths. 



7. Ph. cordifolia, green ; segments alike and equal ; head semi- 

 elliptical ; tentacular cirri in four pairs, all attached to the first 



