304 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



complete. The prostomium is truncate at its frontal margin and has no 

 eyes. Branchiae are present from the sixth segment and already so large 

 as to extend distally as far as the postsetal notopodial lobe of the same 

 segment. Farther back they increase in size and are densely fimbriated 

 at their lateral margins (fig. 4). On each segment the two branchiae are 

 widely separated middorsally and connected by a raised ciliated ridge. 



Thoracic notopodia resemble those of the stem species. Neuropodia 

 of the first segment have a short papillar lobe at the middle part of the 

 postsetal ridge. By the seventh segment the lobe is about a third of the 

 distance from the upper end of the ridge and by the tenth segment it is 

 at the uppermost edge of the ridge and longer. Neuropodial setae are of 

 two kinds; some are distally pointed (fig. 2), others are uncini. The 

 pointed setae resemble those of notopodia. Uncini are partly smooth 

 along the free ends and partly ridged at the outer edge (fig. 1) ; some 

 have a hyaline hood at the distal end. 



Abdominal notopodia have a long, slender, distally tapering postsetal 

 lobe (fig. 4) and carry a fascicle of long, pointed setae. Furcate setae 

 are absent. Abdominal neuropodia have a much shorter postsetal lobe 

 broadly triangular at the base and prolonged distally from the superior 

 part of the lobe. There are three to five yellow acicula in transverse 

 series with the distal ends projecting from the parapodium. The largest 

 and longest aciculum is uppermost and there is a gradual decrease in 

 size and length going ventrally. The accompanying setae are long, 

 slender and distally pointed. 



Naineris grubei australis resembles the stem species in the shape of 

 the prostomium, the early occurrence of branchiae and the kinds of setae 

 and uncini. In the subspecies, branchiae are present from the sixth in- 

 stead of seventh segment ; the transition from thorax to abdomen is at 

 segments 29 to 38 in the subspecies and at segment 17 in the stem species. 



Distribution. — Naineris grubei australis has been taken only in 

 southeastern Australia in the vicinity of Adelaide, South Australia. 



Naineris bicornis Hartman, 1951 

 Plate +0, figs. 1-6 



Naineris bicornis Hartman, 1951, pp. 72-74, pi. 19, figs. 1-6. 



Collections. — This has been taken only from Florida in the Gulf of 

 Mexico in intertidal sandy beaches. 



Total length is about 30 mm, greatest width 5 mm and segments 

 number over 100. The prostomium is truncate and slightly emarginate 

 at its frontal margin (fig. 1) ; the everted proboscis is voluminous and 

 somewhat lobed. Parapodia from the first segment have elongate post- 

 setal lobes. Branchiae are present from the sixth setigerous segment and 



