224 ART, IL A. IZUKA : 



podiated segments, extends posteriorly to the commencement of 

 the 4th segment and terminates with a free tapering extremity. 

 A pair of large eyes is situated in line with the anterior margin 

 of caruncle ; behind them a pair of smaller eyes. 



Anterior to mouth-opening there are 2 prominent fleshy lobes, 

 extending to the anterior border of prostomium. The posterior 

 border of mouth is formed by the anterior margin of the 4th 

 segment. 



Typical body segment bears in dorsal aspect a branchial 

 tuft, a well-marked dorsal papilla with a fascicle of bristles, 

 and a long dorsal ramus on each side. Anteriormost 3 segments 

 without branchial tuft, but each with a secondary bmall cirrus 

 at base of dorsal cirrus. This secondary cirrus becomes much 

 shorter in the 4th segment (first branchiated segment), and is 

 almost invisible in the 5th. 



Dorsal bristles spring out in a radiating fan-like manner from 

 a papilla. The bristle (fig. 3) is long and tapers to the pointed tip ; 

 on one side it is smooth and bears a basal spur, on the opposite 

 edge provided with 14-24 (McIntosh gives 20) large recurved 

 fangs, besides being faintly serrated in the distal part beyond 

 the fangs. Anterior dorsal bristles have, in some cases, the distal 

 part smooth and are provided with larger basal spur (fig. 4). 

 Ventral bristles long and slender, yellowish in colour, with tip like 

 that represented in PL XXII, fig. 5. 



Dorsal cirrus arises from the posterior border of bristle- 

 papilla, and consists of a cirriphore and an elongeted style, 

 wliich latter is purplish -brown throughout, whereas the former 

 is less deeply coloured and shows a pale yellow band in front. 

 From the base of dorsal cirrus a fan-shaped patch of pigments 

 extends downwards and inwards on the bristle-papilla. Ventral 



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