NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 291 



Scoloplos (Leodamas) rubra (Webster) 1879 

 Plate 32, figs. 1-6 



Aricia rubra Webster, 1879, pp. 253-255, pi. 9, figs. 123-126. 

 Scoloplos {Leodamas) rubra Hartman, 1951, pp. 74-76, pi. 20, figs. 

 1-6. 



Collections. — Many from littoral sands in North Carolina and 

 Florida. 



The body is long, slender and greatly depressed in the thorax ; length 

 is about 70 and width only 1 mm. The prostomium is acutely pointed 

 and longer than wide; it lacks eyes (fig. 1). Transition from thorax 

 to abdomen is at segment 24 or 25 and more or less abrupt. Branchiae 

 are first present from the sixth and continue on all other segments ; they 

 are simple, lingulate throughout and conspicuously fimbriated. 



Thoracic neuropodia have a long transverse postsetal ridge without 

 lobes (fig. 3). They have three to five transverse rows of uncini, most 

 of which are distally curved and have transverse rows of ridges (fig. 4). 

 Abdominal parapodia have a long tapering notopodial postsetal lobe 

 and a similar, though smaller, neuropodial postsetal lobe (fig. 2). Fur- 

 cate setae (fig. 6) accompany the pointed setae in notopodia. Neuro- 

 podia have a projecting yellow aciculum that is distally hooked (fig. 5). 



Distribution. — Scoloplos {Leodamas) rubra is known from eastern 

 and southeastern shores of the United States, in intertidal sandy beaches. 



Scoloplos (Leodamas) dendrobranchus, new species 



Plate 33, figs. 1-3 



Collections. — Encounter Bay, on limestone reef among Zostera roots, 

 pebbles and sand (6) ; Snapper Point in midtidal part of sandy beach 

 (6) ; and Port Willunga on jetty piles and dug up from sand (4) ; all 

 from South Australia, collected by S. J. Edmonds. 



Total length of the largest individual is about 45 mm; greatest 

 width in the middle thorax is about 3 mm ; number of segments is 230 

 or more. The body is greatly depressed in the thorax; it is narrowed 

 forward to an acutely pointed prostomium and backward to a narrower, 

 cylindrical abdomen. The separation between thorax and abdomen is 

 weakly visible except for a change in neuropodial lobes. The posterior 

 end of the body appears unusually ragged because of the extensively 

 divided branchiae (fig. 2). 



