188 AKT. IT. — A. IZÜKA : 



1885. Syllis ramosa, Mcintosli. " Cliallenger " Rep. Armel., p, 198, 

 PI. XXXI, fig. 1. 



The living animal is of a beautiful rose-red colour, in 

 contrast to the colourless sponge in which it is found ; it may 

 thus be easily detected when present, in spite of the thinness of 

 its body. 



The anneHd is found located for the most part in the gastral 

 cavity and adjoining canals of a certain Hexactinellid sponge 

 {Crateromorpha meyeri rugosa Ijima) collected in Sagami Bay. 

 The anneHd is very remarkable for the unique power of branching 

 or budding. 



The intricate manner, in which the branches are entangled 

 in the sponge, makes it a very difficult matter to extricate the 

 worm ; even after removal from the sponge it is a laborious 

 operation to unravel it without frequent rupture. 



The body as well as the numerous branches measure 

 about 0.7 mm. in breadth aud 0.3 mm. in thickness. Each seg- 

 ment is furnished with a pair of parapodia. 



The parapodium has dor sally a long cirrus, composed of a 

 variable number of joints. The longer cirri consist of about 28 

 joints ; and the shorter cirri, which alternate with the longer, 

 show about 15 joints. The setigerous lobe is somewhat conical 

 and is provided with a few bristles. Each bristle with stout shaft 

 and short terminal piece, the latter rather indistinctly separated 

 from the former and having curved tip. A single stout acicula 

 supports the setigerous lobe. The ventral cirrus is broad and 

 short. 



Young buds consist of numerous, distinctly marked, narrow 

 segments, each furnished with well-formed parapodia. They 

 remain slender until after reaching a considerable length ; into 



