NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 303 



Naineris nannobranchia (Chamberlin) 1919 



Nainereis nannobranchia Chamberlin, 1919c, pp. 260-261, pi. 2, fig. 10, 

 pi. 3, fig. 1. 



This species comes originally from Mendocino, California. The thor- 

 ax consists of 26 segments. Branchiae are first present from segment 20 to 

 23 and small ; they increase in size farther back but are unusually small 

 and inconspicuous and absent in posterior segments. The prostomium is 

 semicircular. Thoracic notopodia have a postsetal lobe that is large, 

 subconical and diminishes in size posteriorly. Thoracic neuropodia have 

 a postsetal lobe that is vertically elongate and broadly convex at the 

 edge. In abdominal neuropodia the postsetal lobe is a small conical 

 process. Thoracic neuropodia have setae of two kinds, including two 

 anterior rows of nearly smooth uncini and subuluncini, and a ventro- 

 posterior fascicle of slender pointed setae. Length approaches 50 mm; 

 width is about 3 mm; number of segments about 237. 



Distribution. — This is known only from Mendocino, California. 



Naineris grubei (Gravier) 1909 



Scohphs grubei Gravier, 1909, pp. 646-649, pi. 18, figs. 49-57. 



This species is characterized by having 17 thoracic setigerous seg- 

 ments. Branchiae are present from the seventh and continue on all other 

 segments; they are simple throughout. The prostomium is broadly 

 truncate and has no eyes. The everted proboscis is dendritically branched. 

 Thoracic neuropodia have postsetal lobes that are triangular and longest 

 at the superior end. Thoracic neuropodial setae consist of long pointed 

 and ridged uncini. 



Distribution. — Naineris grubei comes from Peru and is more widely 

 recorded from Ecuador and Chile (Augener, 1933c, p. 63). 



Naineris grubei australis, new subspecies 

 Plate 39, figs. 1-4 



Collections. — Port Noarlunga (1), Encounter Bay (1), both south 

 of Adelaide and Troubridge, Yorke Peninsula (1), all from South 

 Australia, collected by S. J. Edmonds. 



Length of a posteriorly incomplete individual is 40 mm ; width in the 

 thorax or widest part of the body is about 3 mm. The thorax consists 

 of 28 segments and is followed by a long transitional region comprising 

 segments 29 to 38; thereafter the change to abdominal neuropodia is 



