38 AET. 4. 1. IKEDA : 



gestion as to the physiological nature of the structure. There is 

 no rectal diverticulum. Nor is there an eye-spot present on 

 the ganglion. 



The present species seems to be most nearly allied to Sipun- 

 culus rolumaiius Shipley and S. funafuti Shipley (32). But 

 those two species may both be distinguished from the present 

 by the peculiar form and color of their papillse as well as by 

 the absence of fixing muscles. Besides, S. funafuti is so pecu- 

 liar in color and body-form, that it bears no resemblance to the 

 present species in external aspects. 



Habitat : Numerous specimens were collected by me, in A^yW 

 1901, at Koniya (Amami-Oshima), and a single one at Naha 

 (Okinawashima). All were found near the shore in coral sand. 



Genus ASPIDOSIPHON. 



ASPIDOSIPHON TRUNCATUS, Kefekstein. 



(Figs. 66-67). 

 SelexVka, (28), 1883, p. 118. 



The main characters of this species are indicated in the 

 following extract from Selenka's descrij)tion : 



Color brown all over, but deeper on the anal and caudal 



shields, both of which arc radially grooved. Papillae small, 



