130 AET. II. A. IZUKA : 



and nearly regularly annnlated in the terminal parts, the con- 

 strictions becoming fainter toward the base. 



The first segment with a wide free anterior fold above ; its 

 longest part not lateral, but ventral, owing to the unusually large 

 size and prominence of mandibular lobes. Second segment 

 longest doFsally, where its length equals J that of the first ; its 

 cirri long, slender, annulated, reaching to tip of prostomium 

 anteriorly and to middle of 6th segment posteriorly. 



Parapodia essentially as in E. quinquifida ; dorsal cirrus about 

 as long as in that species, but more distinctly constricted at base. 

 Compound bristles with shaft gradually thickened at the end 

 for a distance considerably exceeding the length of the end -piece, 

 which is 4-6 times as long as wide and is provided with two 

 teeth ; the terminal tooth slightly hooked, the sub terminal tooth 

 broad and straight ; guard broad, not mucronate. Setose bristles 

 rather strongly curved, tapering to an exceedingly acute point. 

 Pectinate bristles with about 9 teeth on the expanded end ; two 

 marginal teeth being produced to unequal length. Posterior hooks 

 with rather strongly sigmoid curvature and with bifid hooked end. 



Branchiae slender and simple on 4th — 10th segments, trifid on 

 11th — 14th segments, quadrifid on from. 15th to about 23rd 

 segments ; then again trifid to 27th segment, bifid on 28th— 32nd 

 segments, and finally simple to the last pair. 



Maxillary forceps stout, strongly hooked and curved ventrally 

 near the broad base, which is provided with a prominent tubercle 

 for muscular attachment ; the holder broad, not constricted. 

 Mandibles prominent, the two halves freely movable on each other, 

 the whitish calcareous pieces less than J the length of the 

 slender yellow carrier, strongly divergent, irregularly oval in form, 

 with four teeth oai cuttins: edge. 



