88 Bulletin Vanderbilt Marine Museum, Vol. VII 



Eight pairs of tentacular cirri are present, four pairs of cirri 

 being borne on either side by the partially coalesced first, second, 

 third and fourth segments. Each of these cirri arises from a dis- 

 tinct bulbous peduncle and is composed of numerous annuli form- 

 ing a very flexible, long, slender, tapered, white tentacle. 



The peristome forms a thick lip continuous ventrad surround- 

 ing the aperture. Tliis lip is decidedly wrinkled longitudinally by 

 muscle constrictions. 



The body is fusiform, attaining its greatest diameter from the 

 sixth to tenth somites and decreasing in size cephalad and caudad, 

 with the related parapodia proportionate. There are eight pairs 

 of tentacular cirri and sixteen pairs of setigerous parapodia. The 

 body is cylindrical dorsolaterally with distinct suture lines defining 

 the cushion-like lateral prominences which project from the ante- 

 rior to the posterior margin of each segment and which support 

 the parapodia. Each of these cushions is marked by several 

 prominent vertical wrinkles. The anus is terminal, slightly dorsad, 

 with two cirri on each side. The venter is flat with a conspicuous 

 papillose area just posterior to the peristome and is also papillose 

 in the median ventral line. 



The parapodium consists of a well-developed process, protrud- 

 ing stiffly from the body as a stout, fleshy cone, compressed in the 

 cephalo-caudad direction and distally truncate and setigerous. 

 The notocirrus arises from near the base dorsad and slightly 

 caudad to the setigerous lobe and consists of a base about one- 

 fourth as long as this median lobe, which supports a tapered, 

 white, thread-like multi-articulate tentacle, which is equal in length 

 to about two and a half times the total length of the parapodium 

 with the setae included. The neurocirrus similarly arises one- 

 third of the length from the base of the parapodium, but is with- 

 out a distinct peduncle, the slender, multi-articulate cirrus arising 

 from the ventral wall of the parapodium, which it scarcely or not 

 at all exceeds in length. The acicule extends obliquely through the 

 fleshy parapodium, with the short, black, thorn-like acute apex 

 protruding slightly dorsad to the setae. 



The setae are deep-set within the supporting parapodium and 

 are golden yellow or light amber, complex, consisting of a long, 

 strong basal shaft which terminates obliquely distally and sup- 

 ports an articulated distal hook-like blade, which always has on 

 its concave margin a distal and a subdistal tooth and frequently 



