58 THE ANNELIDA POLYCHAETA. 



in the form of the neuropodial setae, especially of the most ventral ones which are 

 reduced and have a characteristic curve or geniculation distally, a detail in which 

 it seems to differ from other species of this group as well. 



EuNOE Malmgren. 



Ofvers. K. vet. akad. Forh., 1865, p. 56, 61. 



Eunoa Malmgren, Annulata Polychacta, 1867, p. 6; McIntosh, British annelids, 1900, 1, pt. 2, p. 291. 



EUNOE EURA, Sp. nOV.^ 



PI. 3, fig. 2-6. 



The dorsum along the middle is brownish, darker caudad; laterally the 

 color is of a distinctly greenish tinge. The venter is also light brownish but 

 with a greenish cast along a median longitudinal band. Parapodia and setae 

 lighter, yellowish. 



The body is broad; it narrows from a little in front of the middle cephalad; 

 it is broader caudad of the middle than in front of it, narrowing but moderately 

 over about the posterior fourth, the caudal end rounded. The greatest depth 

 of the body is nearly equal to the greatest width exclusive of parapodia (about 

 8.2 mm.). The depth is uniform over the middle two fourths but decreases 

 conspicuously cephalad and caudad respectively over the anterior and pos- 

 terior fourths. Segments thirty-five in number. Length of type, 45 mm., 

 maximum width, exclusive of parapodia (measured across ventral surface), 8.2 

 mm., to tips of parapodia, 15.5 mm., to tips of setae, 23 mm. 



Prostomium widening anteriorly, subcordate but with apex or posterior 

 end bluntly widely rounded; width (2 mm.) a little exceeding the length; the 

 peaks very low and rounded, inconspicuous, each separated from base of median 

 tentacle and more widely from the lateral. Median longitudinal furrow above 

 on prostomium weak, disappearing caudad; on each side a furrow mesad of 

 the rounded elevation, these furrows running caudad and then obliquely caudo- 

 ectad, thus diverging from each other caudad. Eyes none. Ceratophore of 

 median tentacle at widest level one third the greatest width of the prostomium, 

 strongly narrowed distad, at first abruptly and then gradually; length near the 

 total length of the prostomium; above, over basal portion, a longitudinal median 

 furrow which extends also over part of prostomium, the furrow becoming less 

 distinct caudad. Style missing except for extreme proximal end. Ceratophore 



' e6pus, broad. 



