NO. 2 HARTMAN : POLYCHAETOUS ANNELIDS 269 



in the sand, the posterior end projects slightly above the surface of the 

 beach. Tubes are trim, long conical, measure 60 to 65 mm long; they are 

 nearly straight, constructed of fine sand particles that are gray with a 

 reddish cast. Individuals measure 35 mm or over, thus are larger than 

 those originally described from southern California. Number of setiger- 

 ous segments is 17, but the last one is so reduced as to be easily over- 

 looked; number of uncinigerous segments is 13. Cephalic spines are 

 brassy yellow, number 12 to 13 on a side; they taper to fine points distally, 

 are somewhat flattened ; those near the middle of the series are thickest, 

 and they gradually become slenderer toward the end of each series. Their 

 distal, free ends are usually straight, not coiled, as in the southern repre- 

 sentatives. Scaphal hooks are yellow, number 12 to 13 on a side; they 

 terminate in a rounded hook (pi. 21, fig. 27) but are less curved than in 

 the type. The anal plaque (pi. 21, fig. 25) is weakly lobed at its lateral 

 margins, and the anal tongue (pi. 21, fig. 26) near its posterior end has 

 a crenulate margin and a median papilla. Uncini, in lateral view, show 5 

 teeth, but in frontal view they may be seen to be disposed in double rows. 



Family SabellaHidae 



Key to Species 



Operculum forms a black cone ; opercular stalk marked with oblique 

 dark streaks Phragmatopoma calif ornica 



Operculum yellow, spinous; opercular stalk marked with blotches 

 of dark pigment Sabellaria cementarium 



Phragmatopoma calif ornica (Fewkes) 



Sabellaria calif ornica Fewkes, 1889, pp. 130-132, pi. 7, figs. 3, 4; Moore, 

 1909, pp. 293-294, fig. 6. 

 This occurs at Tomales Point and Dillon Beach, among rocks at low 

 water line. It constructs firmly concreted tubes of sand over hard surfaces. 

 Eggs are purple in mass. Length is 40 to 60 mm. 



Sabellaria cementarium Moore 



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



At Tomales Point and Dillon Beach, this occurs in rocky habitats, at 

 low water line. It constructs tubes of sand, firmly concreted together. It 

 is common, though usually at a lower level than Phragmatopoma cali- 

 f ornica (above). Eggs are bright pink in mass. Length is 50 to 65 mm. 



