NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 285 



sixth segment (sometimes farther back) and are present to the end of 

 the body; they are simple or branched. Podial lobes, subpodial lobes or 

 ventral cirri are present or absent. Interramal cirri are absent. Thoracic 

 notopodia have only pointed setae with embedded acicula. Thoracic 

 neuropodia have pointed setae and uncini, or uncini only. Furcate setae 

 are present in some notopodia or absent. Scolophs (Leodamas) differs 

 from Scoloplos sensu stricto chiefly in having projecting acicula in ab- 

 dominal neuropodia and branchiae present in more anterior segments. 



Key to Species of Scoloplos {Leodamas) 



1. Branchiae branched (pi. 33, fig. 2) on some segments . . 2 



1. Branchiae simple throughout though sometimes abnormally 

 divided 3 



2. Some branchiae palmately divided and with up to 5 terminal 

 filaments S. (L.) latum 



2. Some branchiae dichotomously divided (pi. 33, fig. 2) 

 S. (L.) dendrobranchus 



3. Some notopodial postsetal lobes in thorax and abdomen bi- 

 furcated S. (L.) verax 



3. Notopodial postsetal lobes not bifurcated 4 



4. Thoracic neuropodia with uncini only (an occasional one may 

 have one or a few long pointed setae) 6 



4. Thoracic neuropodia with uncini accompanied by pointed setae 



in regular arrangement 5 



5. Uncini with transverse ridges (pi. 32, fig. 4) ; posterior thor- 

 acic neuropodia with a postsetal lobe at lower third of ridge; 

 transition from thorax to abdomen at about segment 24 to 28 

 S. (L.) tribulosus 



5. Uncini smooth (pi. 31, fig. 3) 11 



6. Last 5 thoracic segments and anterior abdominal segments 

 with 4 or more subpodial lobes in a row (pi. 34, fig. 1 ) 

 S. (L.) fimbriatus 



6. Thoracic segments with few or no subpodial lobes ... 7 



7. Last two thoracic segments with subpodial lobe; furcate setae 

 with tines of equal length . . S. (L.) johnstonei 



7. Without subpodial lobes in thoracic segments ; furcate setae 

 with tines of unequal length 8 



8. About the first 18 abdominal segments with subpodial lobes; 

 transition from thorax to abdomen at about segments 27 to 

 31 S. (L.) cirratus 



