NO. 3 HARTMAN : ORBINIIDAE, APISTOBRANCHIDAE, PARAONIDAE 297 



7. Prostomium truncate (pi. 40, fig. 1) at its anterior margin; 

 thoracic neuropodial ridge with a short lobe at its superior 

 edge 8 



7. Prostomium more or less rounded in front; thoracic neuro- 

 podial ridge with a short lobe at its midlength .... 

 N. quadricuspida 



8. Thorax with about 17 setigerous segments . N. grubei 

 8. Thorax with 28 segments followed by about ten transitional 



segments N. grubei australis 



8. Thorax with about 48 setigerous segments . N. bicornis 



9. Furcate setae absent; transition from thorax to abdomen at 

 setigerous segments 20 or 21 ; branchiae present from segment 

 8 or 9 N. jacutica 



9. Furcate setae present ; transition from thorax to abdomen vari- 

 able, from fourth or not before thirtieth segment . . .10 

 10. Thoracic postsetal lobe of neuropodia a short restricted ridge 

 (pi. 36, figs. 1, 2) ; some uncini more or less ridged (pi. 37, 



fig. 4) N. dendritica 



10. Thoracic postsetal lobe of neuropodia a prolonged foliaceous 

 lobe (pi. 35, figs. 1, 2) ; uncini smooth (pi. 35, fig. 7) or 



nearly so N. laevigata 



Naineris hexaphyllum (Schmarda) from southern and western 

 Africa (Augener, 1918, pp. 421-423, as Scoloplos {N aid oner eis)) be- 

 longs to the group associated with Naineris laevigata (Grube) but is not 

 clearly distinguishable as known at present. In its thoracic parapodial 

 lobes it agrees most closely with N. laevigata (Grube) (see below). 



Naineris laevigata (Grube) 1855 

 Plate 35, figs. 1-8 



Aricia laevigata Grube, 1855, pp. 112-113, pi. 4, figs. 6-8. 



Anthostoma ramosum Schmarda, 1861, p. 62, figs. a-c. 



Lacydes havaicus Kinberg, 1866, p. 252. 



Aricia armata Hansen, 1882, p. 18, pi. 5, figs. 28-32. 



Aricia platycephala Mcintosh, 1885, pp. 353-354, pi. 43, figs. 1-3, pi. 



22a, figs. 16, 17. 

 Naidonereis laevigata Augener, 1925, pp. 33-34. 

 Scoloplos (Naidonereis) laevigata Augener, 1927, pp. 68-69. 

 Nainereis laevigata Augener, 1934, pp. 148-149; Monro, 1933d, p. 



1045; Hartman, 1948b, pp. 103-104, pi. 15, figs. 1, 2. 

 Collections. — Many come from southern Florida, Galapagos Is- 

 lands, Hawaiian Islands (collected by Dr. Robert Hiatt) and Peru 

 (collected by Dr. Wolfgang Weyrauch) 



