274 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



The tube is characteristic; it consists of a long, cylindrical portion, 

 40 cm or longer by 20 mm wide; it has a flaring, distally tesselated top 

 (pi. 25, figs. 61, 62) on one side, which neatly bends over the open end of 

 the tube when the individual is retracted, but is capable of being pushed 

 forward when the tentacles are extended. It consists of a thin, chitinized 

 base covered over with a thin coat of fine, dark gray sand. 



Color in life is pale flesh or somewhat reddish; tentacles are crossed 

 by alternating pale and dark bands; branchiae are red. 



P. pacifica is clearly separable from P. elongata (see above) in that 

 the first has conspicuous lateral lappets on second and third branchial 

 segments, whereas P. elongata has them only on the second branchial 

 segment ; the first has a tube with flaring, tesselated top, the second has 

 a tube with spongelike, reticulated top. The description of P. pacifica 

 Berkeley (1942) was received after the completion of this manuscript. 

 It applies well to individuals from California; the original manuscript 

 name was therefore suppressed. The type locality is Vancouver Island. 



Genus SPINOSPHAERA Hessle 

 Type S. pacifica Hessle 



Branchiae are absent; anterior segments lack lateral lappets. Thoracic 

 setae are present from the fourth segment, uncini from the fifth segment. 

 Thoracic setae include longer and shorter ones, alternating with one 

 another, both provided with flaring, denticulate tip, as typical of the sub- 

 family Amphitritinae, but the subdistal swelling is here minutely and 

 closely spinous. Uncini of the thorax and abdomen are of the same kind, 

 those of the thorax in double rows on some segments ; they have a major 

 tooth below and several rows of fine teeth above. Thoracic setigerous 

 segments are numerous, over 20. Only one species, 5. pacifica Hessle 

 (1917, p. 209) from Japan, has heretofore been referred to this unique 

 genus. 



Spinosphaera oculata, new species 

 Plate22, Figs. 33-36 



Several individuals were taken at Tomales Point, ocean side. Many 

 others come from Caspar, Mendocino County, south to Moss Beach, San 

 Mateo County. This is a long, slender, though much-coiled (preserved) 

 species; it consists of about 41 thoracic and over 100 abdominal setigers. 

 Its total length may attain 40 mm (presei-ved), its greatest width near 

 the middle of the thorax is 2.25 mm and at the anterior end 1.5 mm. It 

 greatly resembles species of Polycirrus in lacking branchiae, but lacks a 

 large, shovellike prostomium and tangled mass of tentacles. The peri- 

 stomial ring is provided with several irregular rows of dark eyespots. 



