292 PROCEEDINGS OF THE ACADEMY OF [April, 



and the collar tuft somewhat cephalad, the others caudad. The 

 collar fascicle is subdivided into two, the others into three ranks 

 closely united above but separating somewhat ventrally, the anterior 

 rank being composed of smaller seta? and separated from the others 

 by a small membranous fold. All thoracic setae (PI. IX, fig. 65) 

 are similar, pale yellow, narrowly bilimbate, the more dorsal ones 

 somewhat longer and those of the posterior rank slightly curved. 

 Abdominal fascicles are much smaller, with seldom more than twelve 

 shorter but otherwise similar setse. At the caudal end a certain 

 number of segments bear much longer, very slender capillary setse 

 without limbse. 



Thoracic tori are very difficult to discern, the long, somewhat irregu- 

 lar series of very numerous uncini being nearly embedded in thick 

 glandular areas below the setse tufts. The narrow, vertical abdominal 

 tori occupy the sides of the segments rather toward the venter. They 

 are crowded fleshy folds slightly free and projecting at both ends, 

 longer in the middle of the abdomen, becoming shorter toward both 

 ends, and finally obsolete caudally. Uncini (PI. IX, fig. 65) ver3 r 

 numerous, not less than 350 on VIII, small, with the toothed margin 

 very long, conspicuously elevated above and prolonged into a slender, 

 blunt and slightly bifid or notched process below and bearing twenty 

 to twenty-five long, slender, acute teeth, of which four or five smaller 

 ones are on the inferior prolongation. No difference between thoracic 

 and abdominal tori was perceived. At the ventral end of each abdomi- 

 nal torus is a small group of simple spines which persist through the 

 caudal region after the uncini have ceased. 



All of the four specimens examined are quite colorless and totally 

 ack pigment. The preserved worms bear a striking resemblance in 

 form to the conventionalized classic torch with the vigorous and some- 

 what divided flame represented by the gill plumes, which when living 

 and extended must form a magnificent crown. 



Tube white, thick, massive, the walls often 5-6 mm. thick and the 

 outer diameter up to 19 mm. The inner layers are hard and stony, 

 the lining somewhat polished, the outer layers becoming chalky and 

 the outer surface roughened by numerous growth lines. The older 

 parts make several irregular open coils beneath and around stones, 

 the newer portions extending freely horizontally into the water, in 

 one case to a distance of 145 mm. Orifice perfectly terete, smooth, 

 polished and thin. 



The type (No. 79, Coll. Acad. Nat. Sci.), together with the tube 

 and two other worms, were collected for the Academy at Pacific Grove, 



