NO. 3 HARTMAN ! ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 279 



Distribution. — Haploscoloplos bifurcatus is known only from South 

 Australia in intertidal sandy or pebbly beaches and from New South 

 Wales, Australia, in 6-8 fathoms. 



Haploscoloplos sp. 



Scoloplos armiger Augener, 1914, pp. 20-24. Not O. F. Miiller, 1776. 

 Individuals from Sharks Bay, Denham, southwestern Australia, in 

 intertidal zones under stones, in detritus and sand, reported as Scoloplos 

 armiger (Augener, 1914, p. 23), are here referred to Haploscoloplos sp. 

 The thorax is said to have only pointed setae; the prostomium is long 

 and conical ; ventral and parapodial fringe are absent. Branchiae are 

 first present in postthoracic segments. The first 7 parapodial pairs are 

 much reduced ; thereafter a small ventral and a slightly larger dorsal 

 lobe are visible along the parapodial ridges. The separation between 

 thorax and abdomen is not sharp. This brief diagnosis agrees reasonably 

 with that of H. kerguelensis (see above). 



Haploscoloplos sp. 

 Plate 28, figs. 4-6 



Haploscoloplos sp., Hartman, 1948, pp. 32-33, fig. 8 d-f. 



Transition from thorax to abdomen is abrupt at the fifteenth seti- 

 gerous segment. Branchiae are present from the eleventh one, increase 

 in size going back and stand erect over the dorsum; they are simple 

 and unbranched throughout. Thoracic parapodia have long triangular 

 postsetal lobes (fig. 4) in notopodia and neuropodia. Abdominal para- 

 podia have a longer notopodial and a shorter neuropodial lobe (fig. 

 5). Setae are all slender and distally pointed, as characteristic of the 

 genus, except for furcate setae (fig. 6) present in notopodia of middle 

 segments. There are no interramal cirri, no ventral cirri and no sub- 

 podial lobes. 



Distribution. — This is known only from Murchison Sound, Green- 

 land, in 60 fathoms. 



Genus Scoloplos Blainville, 1828 

 Key to Subgenera 



Abdominal neuropodia with two or more acicula in fascicles that 

 are more or less completely embedded; branchiae usually 



present from about segment 10 to 26 



. Scoloplos, sensu stricto 



