144 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 22 



The surface throughout is mottled with dark brown spots in dis- 

 persed pattern, most concentrated on the head and first 12 segments. The 

 anterior and posterior ends lack plaques. The body consists of 33 or 

 more segments. The mouth is a very large oval opening on the ventral 

 side of the peristomial segment. The first 10 segments are short, wider 

 than long and set off from one another by deep segmental grooves. The 

 first 7 and the last 5 setigerous segments have single, thick dark spines 

 in neuropodia, and the last 3 acicular segments have no notopodial setae. 

 Tin's region is followed posteriorly by the constricted tapering anal ring 

 with dorsal anal pore. 



The first 7 setigerous segments have tufts of notopodial setae and 

 1 or 2 thick, dark, yellowish brown spines that are conspicuously striated 

 internally and distally slightly curved. The next 3 or 4 segments are 

 transitional, with the uncini increasing in number gradually. The uncinial 

 rows are always short, with not more than 9 to 12 uncini in a row, in 

 median segments. Uncini have 7 teeth in a single row, largest at the 

 base and decreasing in size gradually distally. 



The tube is long, cylindrical, measuring to 200 mm long, and closely 

 fits the occupant. Its walls consist of thick silt over a translucent chitin- 

 ized membrane; it is externally covered with flat fragments of shell bits 

 and other debris and resembles an onuphid tube but is more friable. 



Praxillura maculata remains known only from southern California, 

 in deep water. 



Genus CLYMENOPSIS Ver rill, 1900 



Clymenopsis cingulata (Ehlers) 1887 

 Clymene cingulata Ehlers, 1887, pp. 185-188, pi. 47, figs. 2-5. 



This species was collected in Santa Catalina and Tanner Basins. 

 Two tubes from Tanner Basin are long, cylindrical, measure 70 mm 

 long by 1.8 mm wide; they are constricted at one end, and have a short, 

 hyaline chimney, a characteristic of some other maldanid tubes. Several 

 similar, though smaller, tubes come from Santa Catalina Basin. The 

 body measures to 50 mm long by 1.4 mm wide and consists of 19 setiger- 

 ous, and 9 posterior, preanal asetigerous segments; it lacks cephalic and 

 anal plaques. The fourth segment has a conspicuous collar. Heavy 

 acicular spines are present in 3 anterior segments; they are light yellow 

 and straight, and about 5 times as thick as the accompanying notopodial 

 setae. On the prostomium the nuchal organs are crescentic to somewhat 



