OF PLYMOUTH AND THE ENGLISH CHANNEL. 235 



Genus SIGALION, Audouin and Milne Edwards. 

 Prostominm elongate from before backwards. 

 Median tentacle absent, lateral tentacles short and papilliform, 



fixed to the anterior part of the prostomium. 

 Elytra covering the dorsum; marginal processes pinnate, or with 



long papillae from the axis. 

 The parapodia resemble those of Sthenelais, notopodium clavate 



and furnished with a papilla. Chsetse as in Sthenelais. Neuro- 



podium somewhat truncate and with a papilla internal to the 



cheetee, which are all bifid. 

 Branchite on every foot (^S*. Matildcc). 

 Segmental eminence placed ventrally at the base of each foot. 



fS. MATiLDiE, Aiid. & Ediu. Size to 5 inches. 

 Four eyes, near the centre of the prostomium. 



S. BusKii, Mcintosh. Eyes unknown. 



Genus PSAMMOLYCE, Kinherg. 



Caput antenna singula et 2 aut 4 oculis ; proboscis armata ; primi 

 pedes antice ultra caput porrecti, cirrus tentacularibus instructi ; 

 pedes ceteri quasi uniremes ; elytra medium dorsi hand tegentia, 

 margine fimbriato, papillis obsita. \Garus.'\ 



PSAMMOLYCE HeRMINI^, Aud. & Ed. 



Genus PHOLOE, Johnston. 



Prostomium furnished with a short median tentacle. 



Eyes, two pairs, more or less connate. 



Body linear oblong; elytra on alternate segments in the anterior 



part of the body ; posteriorly a pair on each segment. 

 Eirst foot with two tentacular cirri, without chsetse. 

 Notopodium with slender, tapering, spinous chseta^. 

 Neuropodium with stout, falcate, compound chsetse. 



P. MINUTA, 0. Fabricius. 



Tentacle and cirri somewhat papillose. Size f inch. 



fP. SYNOPHTHALMICA, ClaparMe. 



Tentacle and cirri swollen at the base ; two of the cirri papillose. 



