202 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 1 



Figures 1-8, Rhamphobrachium longisetosum: Fig. 1, maxillae in 

 dorsal view ; Fig. 2, mandibles from same specimen, to same 

 magnification ; Fig. 3, a branchial parapodium, with setae indi- 

 cated ; Fig. 4, a fourth parapodium, with setae indicated; Fig. 

 5, composite spiniger from fifteenth parapodium; Fig. 6, a sub- 

 acicular hook from same parapodium; Fig. 7, one of 2 subacicu- 

 lar hooks from parapodium shown in fig. 3 (figs. 5-7 to same 

 magnification) ; Fig. 8, pectinate seta from same parapodium. 



Figures 9-14, Diopatra cuprea: Fig. 9, a slender limbate seta with 

 narrow wings and nearly smooth cutting edge; Fig. 10, a sub- 

 acicular hooded hook; Fig. 11, tip of a larger, bidentate hook 

 (one of 6 or 7) from second parapodium; Fig. 12, one of 9 to 

 12 pectinate setae from a median parapodium; Fig. 13, second 

 parapodium, in anterior view, setae omitted (specimen from 

 Lemon Bay) ; Fig. 14, tip of a smaller bidentate hook from second 

 parapodium. 



Figures 15-20, Diopatra ornata: Fig. 15, tip of bidentate hook from 

 second parapodium; Fig. 16, mandibles from a young individual 

 (coll. 1206-40) ; Fig. 17, second parapodium in anterior view, 

 setae omitted (coll. 910-39) ; Fig. 18, distal end of pectinate 

 seta, pressed flat, to show numerous teeth; Fig. 19, subacicular 

 hook from an anteromedian parapodium; Fig. 20, maxillary ap- 

 paratus from same individual as that shown in fig. 16. 



Figures 21-23, Diopatra splendidissima: Fig. 21, subacicular hooded 

 hook from an anteromedian segment. Fig. 22, pectinate seta from 

 an anteromedian parapodium; Fig. 23, bidentate hooded hook 

 from second parapodium. 



