2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



mens of A. longipedata in the U.S. National Museum, from the 

 Albatross collections, are in relatively good condition, enabling me to 

 supplement further the previous descriptions and to give an emended 

 diagnosis for the genus, 



Chamberlin (1919) added 2 new species to Admetella Mcintosh, 

 A, dolichopus and A. hastigerens. The type specimens of both species 

 in the U.S. National Museum have been examined and are herein 

 referred to as A. longipedata. Hartman (1938) examined the type 

 specimen of Polynoe(?) renotubulata Moore (1910) in the U.S. National 

 Museum and referred it to Admetella. The specimen has been re- 

 examined and is herein designated the type species for the new 

 genus, Bathymoorea. 



This study was aided in part by a grant from the National Science 

 Foundation (NSF GB-1269). 



Family Polynoidae Malmgren 

 Genus Admetella Mcintosh, 1885; emended 



Type species: Polynoe (Admetella) longipedata Mcintosh, 1885, by 

 monotypy. Gender: feminine. 



Diagnosis: Polynoids with body large, oval, flattened; segments 

 more than 50 (52-82) . Prostomium with 2 long palps and 3 antennae ; 

 median antenna with large ceratophore inserted on middle third of 

 prostomium; lateral antennae inserted on anterolateral extensions 

 of prostomium (i.e., lepidonotoid) ; Avith paired antennal scales. 

 Tentacular segment (I) achaetous, with 2 pairs tentacular cirri, 

 Avith bulbous facial tubercle between bases of palps. Buccal segment 

 (II) achaetous, with paired, long, ventral buccal cirri and first pair 

 elytra; with dorsal, low, transverse nuchal fold. Elytra more than 

 20 pairs, arranged on segments 2, 4, 5, 7, then on alternate segments 

 to 23, and then on every third segment to end of body. Parapodia 

 very long, subbiramous; notopodia small; both rami with elongated 

 digitiform acicular processes. Notosetae form small bundles. Neu- 

 rosetae numerous, forming fan-shaped bundles. Both noto- and 

 neurosetae long, slender, transparent, fragile, inflated, and flattened 

 distaUy, with faint spinous rows and tapered tips. 



Admetella longipedata (Mcintosh) 



Figures 1, 2 



Polynoe (Admetella) longipedata Mcintosh, 1885, p. 124, pi. 14, fig. 5; pi. 20, 

 fig. 6; pi. 12A, fig. 17. 



Admetella longipedata Darboux, 1900, p. 103. — Augener, 1906, p. 123. — Ehlers, 

 1908, p. 40, pi. 2, figs. 10, 11; pi. 3, figs. 1-5.— Horst, 1917, pp. 101, 140.— 

 Ditlevsen, 1917, p. 37.— Fauvel, 1932, p. 27.— Eliason, 1951, p. 133. 



Polynoe mirabilis Treadwell, 1906, p. 1149; 1920, p. 590. [Not Mcintosh, 1S85.] 



