542 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. | 



stouter; P4 9 mm. long with eighteen segments as slender as P^ but 

 slightly stiff er; P5 7 mm. long, resembling P4; P^ 5.5 mm. long 

 resembling P5 but less stiffened; P7 and following pinnules 5 mm. 

 long, the component segments slightly shorter than in the preceding 

 pinnules; distal pinnules very slender, 7 mm. long. 



The color is greenish yellow. 



Type.— Cat. No. 27491, U.S.N.M., from station 5413. 



Family PONTIOMETRID^. 

 EPIMETRA, ne^jv genus. 



Centrodorsal small, hemispherical, the dorsal pole convex. 



Cirri long and rather stout, moderate in number, with between 

 thirty and forty segments, the' ninth and following short and 

 strongly carinate dorsally with swollen distal ends; opposing spine V- 

 shaped in dorsal view, crescentic in end view. 



Structure of calyx and arms as in Pontiometra. 



On the outer arms Po is absent; on the inner arms Po and P^ are 

 absent. The enlarged proximal pinnules are very slender, but j 

 much stiffened and not flagellate distally; on the outer arms Pj is the ! 

 longest; on the inner, P;,; Pj is shorter than P,; P3 is as long as Pj, 

 but resembles Pj; P4 and the following pinnules are very short. 



Genotype. — Epimetra nympha, new species. 



EPIMETRA NYMPHA, new species. 



Centrodorsal small, hemispherical, the dorsal pole convex, 1 mm. 

 in diameter. 



Cirri XIII (deficient in two interradii) 37-39, 12 mm. long; first 

 segment short, the following gradually increasing in length and becom- 

 ing about as long as broad on the fifth; following four to six slightly 

 longer than broad, then gradually decreasing in length, the segments 

 in the outer half of the cirri being nearly twice as broad as long; the 

 eighth segment is a transition segment; the following segments have 

 the distal dorsal edge slightly thickened and produced and the dorsal 

 surface developing a low narrow median keel, becoming more promi- 

 nent in the outer part of the cirrus, so that the dorsal profile of the 

 outer part of the cirri is scalloped; opposing spine in dorsal view a 

 thick V-shaped production of the distal half of the penultimate seg- 

 ment; the two limbs of the V are thick distally, tapering to a fine 

 point at the apex ; in end view this opposing spine is seen as a strong, 

 high crescent. 



Kadials strongly produced interradially, separating the bases of 

 the IBrj for a distance equal to about one-half of their dorsal trans- 

 verse diameter; IBr, IIBr, and IIIBr resembling the corresponding 

 series in Pontiometra andersoni, but the component segments are 

 somewhat longer and the synarthrial tubercles are more pronounced. 



