DACTYLOPUS. 115 



between the apical and lateral setas ; inner branch very- 

 much smaller, subquadrate, extending only half the 

 length of the outer, bearing four primary setaa, two of 

 them long and two of moderate length, the interspaces 

 being densely ciliated. 



" Hob. Roker, on Laminaria saccharina; rare." 



4. DACTYLOPUS TENUIREMIS, Brady and Robertson. PI. 



LYI, figs. 1218. 



Dactylopus tenuiremis, Brady & Robertson. Brit. Assoc. Repoi't, 

 p. 197 (1875). 



Rostrum of moderate length, slender ; anterior 

 antennas very slender (fig. 12), about as long as first 

 body segment ; first four joints (or peduncle) stouter 

 than the flagellum; second and fourth joints much the 

 longest, about equal in length to the last three ; inner 

 branch of posterior antenna 2-jointed. Inner branch 

 of the first foot (fig. 16) nearly as in D. Stromii; outer 

 branch rather more slender. Basal joint of the fifth 

 foot (fig. 17) broad, triangular, bearing a row of five 

 long setaa from the apex to the middle of the inner 

 margin ; outer joint ovate, about as long as the basal 

 joint, its inner margin ciliated, outer margin and apex 

 fringed with eight seta3, the longest of which are at 

 the apex. Tail setaa (fig. 18) short, dilated at the 

 base, the longest about as long as the abdomen. 

 Length - 4 ^th of an inch ('63 mm.). 



Apparently a rare species ; found hitherto only 



