NO. 2 HARTMAN : POLYCHAETOUS ANNELIDS 263 



Girratulus cirratus (O. F. Miiller) 



Fauvel, 1927, p. 94, fig. 33. 



A few individuals were taken at Second Sled Road, Dillon Beach. 

 Length is 40 to 65 mm. 



Girriformia spirabrancha (Moore) 



Cirratiilus spirabranchus Moore, 1904, pp. 492-493, pi. 38, figs. 26, 27. 

 This is common in Tomales Bay and Bodega Lagoon, in muddy 

 sand flats. Color in life is greenish yellow to light brown. Length is 60 

 to 100 mm. Individuals from Bodega Lagoon appear different from others 

 in that they are smaller and darker; also the cardiac body harbors the 

 sporozoite stage of a gregarine. 



Girriformia luxuriosa (Moore) 



Girratulus luxuriosus Moore, 1904, pp. 493-494, pi. 38, figs. 28-31. 



This is common at Dillon Beach and Tomales Point, in oblique, 

 rocky crevices, at moderately low water line. Color in life is drab yellow 

 to reddish brown. Length is 60 to 100 mm. 



Family Gapitellidae 



Key to Species 



1. Thorax consists of 14 segments, of which 13 have setae; some 

 abdominal segments provided with composite branchiae that are 

 retractile Dasybranchus Iwmbricoides 



1. Thorax consists of 12 segments, of which 11 have setae; without 

 branchiae Notomastus 2 



1. Thorax consists of 11 segments, of which segments 2 to 5 have 

 pointed setae only, segments 6 to 11 have long-handled hooks . 

 Mediomastus californiensis 



2. Larger, robust; abdominal segments with conspicuous lateral 

 organs between notopodia and neuropodia . . . N. 7nagnus 



2. Smaller, extremely attenuate; abdominal segments without con- 

 spicuous lateral organs A^. tenuis 



Dasybranchus lumbricoides Grube 



Fauvel, 1927, pp. 148-149, fig. 52. 



Many individuals were collected in Tomales Bay; it is common in 

 low water mud flats. In life it is bluish red, and thick though fragile. 

 Length is 80 to 150 mm. 



