NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 293 



Abdominal parapodia have longer postsetal lobes (fig. 2) than those 

 in front; they are provided with long pointed setae and embedded aci- 

 cula; furcate setae have not been found. Neuropodia have slender fas- 

 cicles of long pointed setae supported by a single projecting yellow 

 aciculum (fig. 3) sharply curved near its distal end. 



There are no subpodial lobes, ventral cirri or interramal cirri. 



Scoloplos (Leodamas) dendrobranchus belongs to a small group of 

 orbiniids in which abdominal segments have branched branchiae. S. 

 (Leodamas) latum Chamberlin (see below) from off Pacific Panama is 

 another one but it differs in that the branching is palmate instead of 

 dichotomous. 



Distribution. — South Australia in intertidal zones, associated with 

 sand, Zostera beds and mixed bottoms. 



Scoloplos (Leodamas) latum (Chamberlin) 1919 



Branchethus latum Chamberlin, 1919a, pp. 358-361, pi. 64, figs. 7-11, 



pi. 65, figs. 1-2. 

 Scoloplos latus Fauvel, 1932a, pp. 167-169, fig. 28 a-e. 



This species is here referred to the subgenus Leodamas because 

 branchiae are present from the sixth or fifth setigerous segments. The 

 thorax consists of about 20 segments. The prostomium is acutely pointed 

 and has no eyes. Branchiae are simple and undivided through about 

 eight segments and thereafter divided. At the thirteenth to fifteenth 

 branchial pairs there are about three branches, and thereafter there is an 

 increase to as many as nine filaments in palmate arrangement. In pos- 

 terior segments the branching decreases so that branchiae are again 

 simple and reduced. 



Distribution. — Scoloplos (Leodamas) latum was first described off 

 Pacific Panama in 322 fathoms, green mud ; it is further reported from 

 Akyab, Burma, in 250 fathoms (Fauvel, 1932a). 



Scoloplos (Leodamas) fimbriatus, new species 

 Plate 34, figs. 1-5 



Collections. — Corney Point (1) and Troubridge Beach (12), 

 Yorke Peninsula, South Australia (taken by S. J. Edmonds). 



All individuals are fragmented posteriorly, larger fragments con- 

 sisting of the anterior end and some abdominal segments measuring 

 about 30 mm long and 2-3 mm wide. The thorax consists of 24 to 29 

 or 30 segments. The transition to abdomen is complete in one segment. 

 The change is most apparent because of the complete disappearance of 



