262 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



Family Ghaetopteridae 



Phyllochaetopterus prolifica Potts 



Potts, 1914, pp. 972-978, fig. 11, pis. 4, 5. 



This occurs at Tomales Point, ocean side, and at Dillon Beach, on 

 under sides of rocks and in rocky coves at low water line. It forms tangled 

 masses of very slender, more or less translucent, irregularly ringed, long 

 tubes, from which the occupants are removed with difficulty. Length is 

 over 60 mm. 



Family Girratulidae 



Key to Species 



1. Very dark in life; constructing calcareous matrices; anterior end 



provided with few (6 to 16) tentacles 



Dodecaceria fistulicola 



1. Orange red to brownish in life; not associated with limestones; 

 anterior end provided with many crowded tentacles .... 2 



2. Prostomium with a row of eyespots on either side; dorsal bran- 

 chiae and setigerous lobes begin at about the same anterior seg- 

 ment Cirratulus cirratus 



2. Prostomium without eyespots; dorsal branchiae arise from seg- 

 ment posterior to the first few setigerous segments 3 



3. Neuropodia in middle and posterior body segments with one 

 (or 2) large, dark, slightly curved spine; inhabits rocky, oblique 

 crevices, or associated with stones . . Cirriformia luxuriosa 



3. Neuropodia in middle and posterior body segments with incon- 

 spicuous rows of 4 or more yellow spines; inhabits sandy or 

 muddy coves Cirrifor?nia spirabranchia 



Dodecaceria fistulicola Ehlers 



Sabella pacifica Fewkes, 1889, pp. 132-133, pi. 7, figs. 1, 2 (not Grube, 



1856). 

 Ehlers, 1901, pp. 186-188, pi. 25, figs. 5-9. 

 D. pacifica Moore, 1909, pp. 268-270, pi. 9, fig. 44. 



At Tomales Point, ocean side, this occurs in coralline algal masses; 

 it also constructs massive limestone matrices. Fewkes' name (1889) is 

 preoccupied by Grube (1856) ; the next available name is that of Ehlers 

 ( 1901 ) . Length is 25 to 40 mm. 



