NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 127 



24. M. striata (Kinberg) (1865, p. 565) from San Jose Island, near 

 Panama (Pacific). 



25. M. stylobranchiata Moore, p. 129. 



26. M. viridis Treadwell (1917, p. 264) from Florida. (This is prob- 

 ably identical with M. sanguinea, below.) 



Key to Species of Marphysa 

 1. Composite setae distally pointed; branchiae first present from 

 segment 15-40, continued to near end; branchiae with 4 to 7 

 filaments where best developed, the filaments more or less pal- 

 mately arranged on the stem; subacicular hooks inconspicuous, 

 present in a short, posterior region but not to the end . . . 

 M. sanffuinea, p. 127 



1. Composite setae distally falcate, with bidentate tip ... . 2 



2. Branchiae are simple filaments throughout, first present at about 

 segment 16-20, continued to near end or absent on the last 20- 

 30 segments M. stylobranchiata, p. 129 



2. Branchiae branched, at least in part 3 



3. Prostomium entire in front; dorsal cirrus after a few anterior 

 segments comes to have a secondary ventral process .... 

 M. mortenseni, p. 129 



3. Prostomium bifid in front; dorsal cirri cirriform .... 4 



4. Branchiae limited to a short region, approximately through seg- 

 ments 10 to 18, and with 5 to 7 filaments in pectinate series; 

 acicula yellow; small in size, about 30 mm long .... 

 M. conferta, p. 129 



4. Branchiae first present from about segment 13-20, continued 

 through a long median and posterior region; branchiae with 7 

 to 9 filaments, pectinately arranged, where best developed; 

 acicula black; size large, robust, over 50 mm long .... 

 M. aenea, p. 128 



Marphysa sanguinea (Montagu) 

 Plate 8, Figs. 179-183 



Ehlers, 1887, p. 97; Fauvel, 1923, p. 408, fig. 161 ; Monro, 1928, p. 86; 



1933, p. 69. 

 M. calif ornica Moore, 1909, pp. 251-253, figs. 13-20. 



Collections.— \0n-'i9 (1); 1048-40 (1 + ); ?1075-40 (1); 1136- 



40 (1); 1210-40 (1); 1297-41 (1); 1437-41 (4); 1441-41 (1); 1441a- 



41 (3); 1442-41 (many); Point Fermin, California, shore (1); En- 



