232 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



563-36, ?567-37, 610-37, 683-37, 706-37, 843-38, 845-38, 881-38, 882- 

 38, 888-38, 898-38, 900-38, D-93, D-104. Numerous specimens. 



Simple, uncinigerous setae are generally present from the tenth to 

 twelfth segment. 



Distribution. — Eastern Pacific from British Columbia south to Peru; 

 Australia (Augener) ; Japan. Intertidal, to 900 fms. 



Family Nephthyidae 



The Nephthyidae are represented in the collections by 12 species, or 

 subspecies, 3 of which are thought to be new, and most of the others are 

 known only through one or a few records. Only 2 are typically intertidal. 

 It is to be expected, however, that this number will be considerably en- 

 hanced once our knowledge of sandy beaches is increased. All of the 

 others were taken from dredgings in shallow waters, regions that have 

 been little explored. These areas may be expected to yield rich returns 

 when intensively studied. 



Genus NEPHTHYS Cuvier 



Key to Species 



1. Proboscis without papillae; recurved cirri involute; dorsal and 

 ventral cirri long, conspicuous, surpassing the other parapodial 

 lobes in length (pi. 39, fig. 84) .... N. iner?nisj p. 234 



1. Proboscis provided distally with well-developed papillae; re- 

 curved cirri involute or curved outward; dorsal and ventral 

 cirri not surpassing the other lobes in length 2 



2. Recurved cirri involute (pi. 40, fig. 94) ; lyre setae (pi. 40, 



fig. 95) present or absent 3 



2. Recurved cirri directed outward (pi. 39, fig. 87) ; lyre setae 

 absent 5 



3. Postsetal lobes serrated, divided in 4 lobes in posterior para- 

 podia (pL 40, fig. 94) ; lyre setae absent . A^. lobophora, p. 234 



3. Postsetal lobes not serrated ; lyre setae present or absent . . 4 



4. Postsetal lobes expanded, foliaceous (pi. 39, fig. 90) ; noto- 

 podial acicular lobe prolonged in a slender process ; dorsal edge 

 of neuropodia with slender lobe . A^^. macroura peruana, p. 236 



4. Postsetal lobes short, inconspicuous in posterior parapodia; 

 notopodial acicular lobe not so prolonged ; dorsal edge of neuro- 

 podia with a slender, digitate lobe . . A^. dibranchis, p. 237 



