222 THE AMPIilNOMID.E, APHUODITID.K, POLYNOID.E, AND SlGALlONlDyE 



Branchiiie dorsal, in rows, and more or less ramose. 



Palpi forming fixed lobes on each side of the mouth. 



Mouth opening on the ventral surface and extending over several 



segments. 

 Buccal apparatus complex. 



*E. FOLIOSA, And. ct Echv. Size nearly 1 inch. 

 Branchife with ovate expansions at the tips. 



E. ARMADILLO, Sars. Size i inch. 

 Branchiae with lanceolate tips. 



E. KoBERTSONi, Mcintosh. Size | inch. 



Branchiae with digitate tips, only a trace of a swelling. 



f E. INTERMEDIA, St. Josepll. 



As E. foliosa, with a bundle of chtetse between noto and ueuro- 

 podia. 



Family APHRODITID^. 



Annelids of an ovate or oblong form, convex dorsally, with a distinct 



prostomium, on which are a pair of eyes and a median tentacle, and 



under which is a papillose facial tubercle. 

 No lateral tentacles, two palpi. Tentacular cirri long, buccal cirri 



(ventral cirri of the second foot) moderately long. 

 Proboscis long and powerful, with four muscular ridges representing 



teeth, and a tough internal lining. 

 Dorsal fimbrise small, alternating with the elytra, or absent. 

 First foot bearing three dense tufts of bristles. 



Elytra, fifteen pairs occurring on segments 2, 4, 5, 7, 9, . . . 25, 28, 31. 

 Segmental organs (nephridia) opening by well-marked papillse pointing 



upwards between the feet. 



Aphrodita, Linn. 



Elytra concealed by a close felt of simple hairs. 

 Eyes sessile. All chtette simple. 



L^tmatonice, Kinherg. 



Elytra concealed by a close felt of simple hairs. 



Eyes on short peduncles. 



Chaetae of the elytra-bearing feet glochidiate. 



Hermione, Blainvillc. 



No dorsal felt. Eyes pedunculate. 

 Elytra alternating with dorsal cirri. 

 Chaetae simple, glochidiate, and bidentate. 



