THE GEPHYREA OF JAPAX. 49 



(ventral) votraetov muscles (vvi, Fig. 85) arise just in front of the 

 caudal shield. The intestinal convolution (vc) consists of 10-1") 

 spirals, traversed by the spindle nuiscle {sm), which is fixed to 

 the body-wall at both ends. No fixing muscle is present. The 

 rectum is long and lacks a diverticulum. Tlie anus is situated 

 just behind the anal shield. The two segmental organs (so) of 

 a reddish brown are about as long as the body proper and are 

 fixed to the body-wall by a mesentery along their entire length. 

 Their external apertures lie a short distance behind the anus. 

 The two eye-spots appear as brown specks on the ganglion. 



Habitat : Numerous specimens of this species were found 

 (April 1901) in dead corals, at Koniya in Amami-( )shima 

 Island. 



Genm CLŒOSIPHON. 



CLŒOSIPHON JAPONICUM, n. sp. 



(Figs. 13, 86-89). 



This species is one of the commonest Sipunculoids met with in 

 the Eiukiu and Amarai-Oshima Islands. The general external 

 and internal characters seem at first glance to agree well with 

 those of Clœosiphon asperg ilium Quatrefages, C. mollis Selenka 

 & BüLOW or C. javanicum Sluiter, but careful examinations 

 bring to light some important points characteristic of each of the 



