.184 AKT. II. A. IZUKA : 



Anal segment short and small, somewhat conical, the tip 

 facing posteriorly, with 2 long anal cirri. 



Parapodia in 13 pairs, increasing in size from the first and 

 almost to the last. The setigerous lobe is stout, with a conical 

 papilla above acicula. Dorsally is a long indistinctly annnlated 

 cirrus, which arises from the posterior part of the lobe. Bristles 

 in a dense group ; terminal -piece longest in dorsally placed 

 bristles, and shortest in ventrally placed ones, each tapering to 

 the hook at tip, with a process on the edge beneath the terminal 

 liook. Ventral cirrus curved, lanceolate, scarcely reaching to tip 

 of the setigerous region. 



Colour of living specimens purplish brown dorsally, with 

 a median longitudinal yellowish patch in each segment, except 

 on anteriormost six segments and the anal segment; on the 

 sixth segment a broad yellowish transverse band ; posterior half 

 of penultimate and anal segments lighter coloured. All the 

 tentacles and cirri are milk-white ; when not extended, they are 

 curled up into regular compact spirals close to the body, and 

 are frequently clustered over the dorsum so as to almost conceal 

 it. At other times the cirri are thrown out perfectly straight ; 

 but on least annoyance, they coil up one after the other. 



Habitat : — In a tide- pool near Misaki in Prov. Sagami, August 

 17th, 1906. 



Genus Trypanosyllis Claparède. 



Prostomium with well -developed palpi. Eyes four, large ; 

 tentacle large, long, and distinctly articulated. Boby propor- 

 tionally large, with large dorsal cirri which are alternately long and 

 short. i\nal cirrri two, with a short median process between them. 



