9 

 9' 



10 



10' 



11 

 11' 



12 



12' 



A ventral cirrus below anterior abdominal neuropodia Haploscoloplosfmgilis 



No ventral cirrus Haplnsrolophs roh,st»s 



First pair of branchiae on setiger 5-6. ScoUipIos (Luxhnnas). 



[Abdominal neuropodia with inner lobe much shorter than 



outer; no ventral cirrus] Senloplu. (L.) vnhm 



First pair of branchiae on setiger 8-10 on some subsequent 



segment Smloplos (Scoloplos) H 



One or two foot-papillae on last thoracic neuropodia; 1- 



ventral cirri on anterior abdominal segments ScoI„plns (S.) acmcceps 



One foot-papilla on last thoracic neuropodia; no ventral cirri 



on anterior abdominal segments 12 



Eighteen or nineteen thoracic setigers with branchiae from 



setiger 17-18. No brown bars on posterior thorax Sn'loplos (S.) armrrcps 



Seventeen or eighteen thoracic setigers with branchiae from 



setiger 13-14. Brown bars across thorax from setiger 9 Sr('l<>pl<'s (S.) capnixi^ 



Phylo ornatus (Verrill, 1873) 



Orbiuia oniata. - Hartman, 1945: 28 



1963a:285, Fig. 75 a-b. 

 Plijlld onnttii^. - Hartman, 1957: 265, pi 



Fig. 1-10; - 1969: 41, Fig. 1-5. 



Pettibone, 



i4: 



Records. — Cape Hatteras area to Beaufort, 

 intertidal to 10 m (5, 9, 11. 13, 18). 



Di-'^triluitioi. — Massachusetts to the Gulf of 

 Mexico; California to Pacific coast of Mexico; 

 intertidal to 32 m. 



Phylo felix Kinberg, 1866 



Plnihi fi'lij-. - Hartman, 1957: 262, pi. 23: Fig. 

 1-7. 



/jt.(.o,Y/.s'.— Off Beaufort in 120-200 m (*). 



Distrih/itio)!. — Brazil south to Antarctica; 

 California to Pacific coast of Mexico; in shallow 

 dredgings to 200 m. 



Orbinia americana New Species 



Figure 12c-K 



H(,U,t!ipi.—l]S^M 43138. 



Dc!<cripti(>ii. — Holotype incomplete, and 10 

 mm long for 38 segments. Prostomium acutely 

 pointed and without eyes. Thorax (Figure 12c) 

 of 21 flattened setigers. Branchiae from setiger 

 5. Notopodial lobes evident from setiger 1. 



Thoracic neuropodia (Figure 12d) as lateral 

 ridges with an increasing number of foot- 

 papillae; setiger 3 with three; setiger 4 with 

 four; setiger 18 with seven. Stomach-papillae 

 from setiger 17 to 22 with a maximum of seven 

 stomach-papillae on setiger 20. Thoracic noto- 

 setae as tufts of crenulate capillaries plus two 

 or three forked setae with unequal prongs. 

 Thoracic neurosetae as three rows of hooks 

 with a few crenulate capillaries behind them at 

 upper and lower margins. No enlarged spines. 

 Individual hooks (Figure 12e) with smooth, 

 curved ends. 



Abdominal parapodia d(jrsal in origin, with 

 two or three foot-papillae below neuropodia of 

 first few. Branchiae larger than slender post- 

 setal lobes of notopodia. No interramal cirri. 

 Neuropodia (Figure 12 g) bilobed with inner 

 lobe shorter and stouter than outer. First five 

 abdominal neuropodia with two cirri basally; 

 sixth and subsequent neuropodia with only the 

 superior one persisting as a ventral cirrus. 

 Abdominal notosetae include numerous capil- 

 laries and three or four short forked setae. 

 Abdominal neurosetae include two acicula, one 

 or two long flail-setae with faintly serrated 

 shafts and abruptly tapered tips (Figure 12f). 

 and two or three shorter, evenly tapered crenu- 

 late capillaries. 



Rt Diarks. — This species is allied to Orhhiia 

 sifdiii Pettibone, but there are fewer thoracic 



89 



