4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



then on every third segment to end of body. Elytra missing on all 

 specimens examined (according to Treadwell, 1923, elytra are large, 

 delicate, gray to black in color). Dorsal tubercles on cirrigerous 

 segments inflated, thin walled, continuous as inflated ridge to base of 



Figure 1. — Admetella longipedata: a, dorsal view anterior end (USNM 19150) with phar- 

 ynx partially extended, ocular areas not pigmented, styles of median antenna and right 

 lateral antenna and right antennal scale missing, styles of right tentacular cirri missing (1), 

 elytra and styles of buccal cirri missing (II), styles of dorsal cirri missing (III); b, lateral 

 view anterior end (USNM 17606) with pharynx partially extended, ocular area pig- 

 mented, style of median antenna missing, tentacular cirri missing (I), style of buccal 

 cirrus and elytron missing (II); c, ventral view of several segments on right half in middle 

 part of body. (I-III= segments, anSc= antennal scale, bC=cirrophore buccal cirrus, 

 elp=elytrophore, fT= facial tubercle, neP=nephridial papilla, nuF= nuchal fold, vC= 

 ventral cirrus.) 



short cylindrical cirrophores of dorsal cirri ; styles of dorsal cirri long, 

 extending beyond the tips of neurosetae, delicate, with tapered tips. 



Prostomium (figs, la, 6) bilobed, much wider than long, with pair of 

 very large rounded ocular areas, pigmented or colorless. Ceratophore 

 of median antenna large, occupying middle third of prostomiimi and 

 projecting dorsally; style usually missing (delicate, slender, extending 



