Ou the Pelagic Annelids of Japan. 



11 



the middle parts of body with ;i fin-gland in each 



T. Apsteini Rosa. 



Totnopieris pact flea, n. sp. 



Body measures 11.5 nun. in length, 1.7, mm. in maximum 

 breadth, and 6 mm. in same including parapodia and fins at about 

 the 5th parapodiated segment. It consists of 20 segments, in 

 addition to a slender tail-region of about one-third the length 

 of body. 



Eyes two, black, dorsal in position; each being of a crescent- 

 like outline with concave external and convex internal border. 



First pair of tentacular cirri filiform, slightly shorter than the 

 tentacles, and each with a single bristle within. Second tentacular 

 cirri about J as long as body-proper, or about § the total length of 

 body together with tail-region. 



A nuchal ciliated groove is observed, arising from postero- 



1 / 



Tomopteris pacifwa, n. sp. 



1, Dorsal view, 5/1. 2, Anterior end in ventral view, 15/1. 3, A " rosette-l'orm " organ, 



115/1. 4, 9th parapodium of the right hand side in posterior view, 24/1. 



