NO. 5 HARTMAN : POLYCHAETOUS ANNELIDS 335 



(pi. 49, fig. 4). The antennular membrane has 18 to 25 or 30 long, fili- 

 form fringes. The oral tentacles are numerous, over 30, long, crowded, of 

 varying sizes. Branchiae are nearly equal to one another, or the first pair 

 is slightly the larger. 



The setal fascicles of the first 3 setigers are reduced, much smaller 

 than those in succeeding notopodia, but resembling those farther back. 

 The next 13 segments have larger notopodial fascicles and uncinigerous, 

 neuropodial tori. The last 2 segm^ents lack setae (rarely the next to the 

 last has a tiny fascicle). The shorter notosetae resemble the longer except 

 that their cutting edge is delicately denticulate. Uncini have their major 

 teeth disposed in 2 rows, about 5 teeth in a row (pi. 49, fig. 6), but the 

 top row tends to have 3 smaller teeth (pi. 49, fig. 3) ; medially there is a 

 tuft of very fine teeth. 



Scaphal hooks number about 13 on a side, the outermost are the 

 largest, decreasing in size medially, the innermost greatly smaller (pi. 49, 

 fig. 2) . All are gently curved distally. The margin of the scapha is weakly 

 lobed (pi. 49, fig. 1). The anal tongue has an irregular, crenulate margin 

 and a median papilla. 



P. calif orniensis belongs to a small group in which the number of 

 scaphal hooks is large (about 13 pairs) ; to it belong chilensis, antipoda, 

 and belgica. P. antipoda is characterized by having a pair of crenulate 

 folds on the ventral side of the second setiger; P. chilensis is a much larger 

 species (see page 333), its scaphal hooks are distally oblique, and uncini 

 have 7 or 8 rows of teeth; P. belgica has scaphal hooks that are weakly 

 bent. 



P. californiensis has been collected in quantity from numerous sta- 

 tions, all save one (Todos Santos, Lower California) in southern Califor- 

 nia. Its optimum density appears to be between Laguna Beach and Re- 

 dondo Beach, in 25 to 100 fms, but it occurs also in the intertidal (Ana- 

 heim Slough). It is usually associated with fine, dark or muddy sand, but 

 its tube is reddish. It is sometimes found near Cistenides brevicoma, from 

 which it may be distinguished in that the former has a nearly straight tube 

 of finer sand grains, whereas C. brevicoma uses darker, coarser materials. 



Holotype. — AHF no. 34. 



Pectinaria californiensis newportensis, new subspecies 

 Plate 49, Fig. 8 ; Plate 52, Fig. 22 



Collections. — Newport Bay, California, shore (3 with tubes). 



