2<2 Art. 5. — A. Izuka : 



lateral side of each eye and extending to the ventral surface of 

 body running between first and second tentacular cirri. 



First and second parapodia each with a ' ' rosette-form ' ' organ 

 (figs. 2, 3), but without pigment spot on the fins. Third and 

 fourth parapodia without "rosette-form" organs, but with a 

 pigment spot on each fin, near tip of dorsal and ventral rami. 



Fifth to seventeenth parapodia are provided, instead of 

 ' ' rosette-form : ' organs, each with a ventral fin-gland in addition 

 to a pigment spot similar to that on third and fourth parapodia 

 (fig. 4). The ventral fin-gland is highly developed in fifth to 

 twelveth parapodia, and then it decreases in size posteriorly to 

 seventeenth parapodium. Tbc remaining three pairs of parapodia 

 are weakly developed, each provided with two small flap-like 

 processes, of which the dorsal one has a pigment spot; without 

 fin-gland. 



After that there follows the so-called tail-region, consisting of 

 11 segments, of which the anterior eight have each a pair of small 

 pigment spots on the lateral surface near posterior border of the 

 segment. 



Eggs develop in two separate masses, one in the dorsal and 

 the other in the ventral ramus of each parapodium (fig. 4). 



Habitat:— Misaki. 



Toinoptiris ete/jfins Chun. 



1887. Tomopterin elegans, Chun, Bie pelagische thierwelt in grösseren Meerestiefen, 



p. 18, Taf. Ill, Fig. 4. 

 1908. Tomopterls clegans, Rosa, Eaeeolte Planctoniche fatte dalla K. N. " Liguria," 



Vol. I, p. 294. Tav. 12, fig. 16. 



Body 4.0 mm. in length, 0.5 mm. in breadth, and 1.5 mm. in 

 same including parapodia. It consists of 14 segments. Tail- 

 region does not exist. 



Eyes two, very small lightly pigmented. Cephalic tentacles 

 long, gradually tapering towards tip. First tentacular cirri short 

 and slender, being about § as long as the tentacles. Second 

 tentacular cirri reach to about § the length of body. 



