336 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



The tube attains a length of over 40 mm, is nearly straight, and is 

 constructed of moderately coarse sand particles that are closely spaced 

 (pi. 52, fig. 22) . The cephalic spines are brassy yellow with slight coppery 

 tinge on the innermost spines. They are long, slender, basally flattened, 

 tapering to fine points that are distally coiled in a single whorl; they 

 number 9 to 13 on a side, the outermost and innermost being the smallest. 

 The antennular membrane has about 19 slender, widely spaced fringes, 

 completely concealed from view by the long oral tentacles ; the latter are 

 grooved and number over 24, some being longer than others. 



Branchiae are small, only about half as long as the width of the body 

 whence they arise; the first pair is nearly twice as large as the second. The 

 first 3 setigers have only notopodial fascicles, greatly exceeded in size by 

 the next, just as in the stem form. The next 13 segments have a larger 

 notopodial fascicle and uncinigerous, neuropodial tori. All setae are pale 

 yellow or almost colorless. The shorter, notopodial setae resemble the 

 longer except that they are slenderer and the tips are finely denticulate. 

 Uncini have their main teeth in double rows, numbering about 5 in a 

 row, with a tuft of fine, long teeth medially, as in the stem form. Scaphal 

 hooks number 10 to 12 on a side; they are basally thick and distally 

 strongly hooked (pi. 49, fig. 8), much more so than in P. calif orniensis; 

 the innermost are much the smallest. The anal tongue is nearly circular, 

 surrounded at the sides and end with about 16 clavate papillae, and a 

 single, larger papilla is inserted on its dorsal side. A broad, conspicuous, 

 glandular area fills the space between the last 2 parapodia on the dorsal 

 side, extending back to the scaphal hooks. 



Though close to P. calif orniensis, it differs as follows : ( 1 ) the 

 cephalic spines are brassy, not coppery, and are somewhat shorter in com- 

 parison; (2) the scaphal hooks are distally more strongly curved; (3) the 

 tubes are constructed of coarser, lighter-colored sand. 



Holotype. — AHF no. 35. 



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