OF PLYMOUTH AND THE ENGLISH CHANNEL. 223 



Genus APHKODITA, Linnceus. 

 Eyes sessile. 



Dorsum covered with a thick, close felt of massive, simple hair. 

 ChsetPB of the neuropodium long, silky, and iridescent, and like 

 all other chsetse, simple, not barbed or toothed. 

 *Aphrodita aculeata, Linn. 



Genus fL^TMATONICE, Kinherg. 



Eyes on short peduncles placed near the anterior border of 



the head. 

 Dorsum covered with felt. 

 Spines of the elytra-bearing feet glochidiate, other segments with 



lateral bundles of stout bristles and a tuft of hair-like chsetge. 



Chtetaj of the neuropodium semi-pinnate. 

 Segmental organs (uephridia) opening externally by papilla3 directed 



upwards between the parapodia. 

 fL. FILICOENIS, Kinherg. 

 Prostomium tripartite. 

 Glochidiate chatas with three or four teeth. 

 L. PKODUCTA, var. Britannica, Mcintosh. 



Prostomium triangular. Ocular peduncles present, but no eyes. 



No dorsal felt.| 



Glochidiate ch^etaB with four recurved fangs, besides the process 



at the base of the terminal spear-tip. 



Genus HEPtMIONE, Blainvilk. 



Prostomium, with a single tentacle and two palps. 



Peristomium bears cha^ta^ and two long cirri. 



Pedunculated eyes fixed to the margin of the prostomium. 



Maxillse absent or small. 



No dorsal felt. Elytra alternating with dorsal cirri. 



Neuro and notopodial divisions of the feet distinct. 



Elytra -bearing feet with glochidiate dorsal spines and a tuft of 



strong chtetai over the elytra. Neuropodial chsetae bidentate. 

 Segmental papillae from the eighth to the twenty-ninth foot. 

 *Hermione BYSimx, Savigny. Size to 2\ inches. 



Family POLYNOIDiE. 



Body more or less elongate. 



No facial tubercle, convex prostomium ; the base of the tentacle 



arising from the middle anteriorly. Two lateral tentacles, four 



eyes, palpi elongate. 



X This is a divergence from the generic distinction. 



