330 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



14. Phragmatopoma peruensiSj new species 



15. " virgini Kinberg 



16. Sabellaria bella Grube 



17. " bellis Yiznstn 



18. " cementarium Moore 



19. " fissidens Grube 



20. " floridensis, new species 



21. " gracilis, new species 



22. " moorei Monro 



23. " nanella Chamberlin 



24. " spinulosa Leuckart 



25. " vulgaris Verrill 



26. " " beaufortensis, new subspecies 



Genus PHALAGROSTEMMA Marenzeller 



Type P. cidariophilum Marenzeller 



Phalacrostemma setosa (Tread well) 



Sabellaria setosa Treadwell, 1906, pp. 1180-1181, figs. 78-81. 



Material examined. — Type specimen at U.S. Nat. Mus., no. 5224. 



This species was originally described from a collection made by the 

 U.S.S. Albatross at station 4041, in 1902, ofif the west coast of Hawaii, 

 in 253-382 fms. The type collection contains 2 specimens. There are 4 

 paleal-bearing, parathoracic segments ; the opercular paleae are arranged 

 in 2 rows; oral tentacles are lacking; it is therefore to be referred to the 

 genus Phalacrostemma Marenzeller. The paired palpi are proportionately 

 large, fill the space usually taken over by the oral tentacles when present; 

 they are lingulate, with ruffled margins, extend distally to the middle of 

 the longer opercular paleae. A pair of lateral lobes partly surrounds the 

 base of the palpi. Other membranes bordering the oral aperture at the 

 sides and below are also larger and longer than in most species of this 

 family. The lower lip is thick, emarginate. 



There are 4 or 5 pairs of amber-colored, nuchal hooks, forming a 

 straight series on either side; their tips are bent inward and cross those 

 of the opposite side. These hooks are dorsal to the opercular paleae. The 

 latter are pale yellow, in 2 rows but of a single kind, consist of shorter 

 and longer ones. They increase in length from dorsal to ventral ends, 

 and those of the outer series are slightly the longer. They are long, taper- 

 ing, finely and closely transversely serrated and extend far beyond the 

 anterior end of the body. The longest paleae are 4 to 6 times as long as 

 the nuchal hooks. On either side there is a single, spiral (or nearly a 



