340 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



2. Middle opercular paleae alternately long and short (pi. 31, figs. 

 37, 38) S. floridensis 



3. Middle opercular paleae alternately long and short (pi. ?>?>, figs. 

 54, 53) S. bella 



3. Middle opercular paleae resemble one another 4 



4. Middle and inner opercular paleae resemble one another except 

 for longer or shorter distal ends S. gracilis 



4. Middle and inner opercular paleae differ more or less sharply 

 from one another 5 



5. Outer opercular paleae with a long, penicillate spike (pi. 32, fig. 



49) 6 



5. Outer opercular paleae without penicillate spike 7 



6. Middle opercular paleae distally blunt, recurved (pi. 32, fig. 



43), inner paleae elongate (pi. 32, fig. 42) 6a 



a. Outer paleae with many serrations distally (pi. 32, fig. 44) 



S. vulgaris 



a. Outer paleae with few serrations distally (pi. 32, fig. 45) 

 S. vulgaris beaufortensis 



7. Outer opercular paleae with smooth spike (pi. 30, fig. 18) ; 



middle and inner paleae as in plate 30, figs. 19, 20 



S. nanella Chamberlin 



7. Outer opercular paleae with distal serrations 8 



8. Longest part of outer opercular paleae with simple, bifurcated 

 tip (pi. 30, fig. 21 ) ; middle and inner paleae as in plate 30, figs. 

 22, 23 S. fissidens Grube 



8. Longest part of outer opercular paleae with prolonged, serrated 

 tip S. spinulosa Leuckart 



Sabellaria cementarium Moore 

 Plate 32, Figs. 49-52 



Moore, 1906, pp. 248-253, pi. 12, figs. 45-51. 



Collections.— 6\0-?,l (1); 886-38 (1); 891-38 (1); 901-38 (3) ; 

 972-39 (1); 1191-40 (1); 1210-40 (3); 1232-41 (2); 1274-41 (1); 

 1280-41 (3); 1283-41 (1); 1284-41 (several); 1410-41 (1); 1413-41 

 (4); 1415-41 (1); 1417-41 (2); 1418-41 (2); 1419-41 ( 1 ); southern 

 California, shore (several). 



The opercular stalk is blotched with black, persists in alcohol. The 

 opercular paleae are characteristic; the outer ones teiTninate in a long, 

 slender spike, penicillate all around (pi. 32, figs. 49, 50) ; the middle 

 paleae are prolonged distally to a tapering point (pi. 32, fig. 51) ; the 



