204 AEÏ. II. A. IZUKA : 



accommodate the median tentacle. Anterior half of peristomium 

 bears the first pair of tentacular cirri, and more ventrally 

 the palpi. Tentacular cirri short, with very short basal joint. 

 The remaining body- segments well marked, strongly arched above, 

 flattened below, increasing in length to the middle of body. 

 Caudal end blunt. Body measures 88 — 120 mm. in length and 

 4 — 4.5 mm. in breadth including parapodia in the middle parts 

 of body. 



Parapodium uiiiramous throughout, all its parts more or 

 less foliaceous, least so anteriorly. Presetal lobe much the larger, 

 broadly rounded and divided by a narrow cleft at apex ; postsetal 

 lobe very short. Ventral cirrus leaf -like, broadly ovate, obtusely 

 apexed, obliquely attached by basal half of dorsal margin to 

 parapodium. Dorsal cirrus reniform ; its long diameter equal 

 to about twice the short diameter. 



Bristles compound ; shaft very gently curved, slightly en- 

 larged at end, and provided with one large and three or four 

 smaller teeth ; end-piece very delicate, elongate, attenuate, 

 normally straight, the edge knife-like and rather remotely 

 serrulate with small short teeth. 



Habitat : — Matsuwa in Prov. Sagami (!) ; Uraga Channel, 260 

 fathoms ; Sagami Bay, 31 — 41 fathoms (" Albatross "). 



Genus Eulalia Oersted. 



Prostomium furnished with five tentacles, the median one 

 arising in front of the eyes. First segment free from prostomium. 

 Four pairs of tentacular cirri with or without parapodia beneath. 

 Dorsal cirri arranged in various ways. Ventral cirri nearly hori- 

 zontal. 



