On bho Pelagic Annelids of Japan. 5 



Proboscis long and cylindrical, being about equal in length to 

 the anteriormost 12 segments taken together; it is provided with 

 a pair of long subulate, so-called clasping organs, and shows many 

 small papillae on the anterior border in the protruded state. 



Habitat: — Misaki (specimens obtained in this locality during 

 March were found with the body-cavity filled with reproductive 

 elements); Miho in Prov. Suruga. 



Genus Vanadis Claparède. 



Prostomium not prolonged anteriorly beyond eyes. Proboscis 

 without teeth. Parapodium with a cirriform appendage; setse 

 compound. 



Vanadis grandis, n. sp. 



PL I, iigs. 1-7. 



Body slender and exceedingly long, consisting of 688 

 segments; 408 mm. in total length, 1.3 mm. in breadth in the 

 anterior region of body, which tapers very gradually towards 

 posterior end, the breadth decreasing to 0.8 mm. in about 500th 

 segment. 



Prostomium (PI. 1, tig. 1.) together with eyes measures 

 2.2 mm. in breadth, and is provided with two pairs of short 

 conical tentacles, of which the dorsal pair is slightly longer than 

 the ventral and is directed antero-laterally, while the latter is 

 almost ventrally directed. The fifth or median tentacle arises 

 from a little distance behind the line of the anterior border of eyes 

 and is directed anteriorly, reaching to the anterior end of 

 prostomium. The bright red eyes are of an enormously large size, 

 and touch each other ou the dorsal median line of prostomium; 

 each having a clear, almost ventrally directed lens (PI. I, fig. 2). ■ 



The anteriormost 6 segments bear each a pair of tentacular 

 cirri; the first and the second pair of these are simple and long, 



