168 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



ficatlon. Through the courtesy of Professor Si'xten Bock, of the Swedish 

 State Museum at Stockholm, I have been able to see the original and 

 verify its characters; the presence of composite setae (or also hooks) in 

 an anterior region at once sharply sets this off from other species of 

 Lumbrineris. 



Length of 223 segments is about 80 mm. The prostomium is longer 

 than wide, depressed conical (pi. 13, fig. 278). Composite setae (pi. 13, 

 figs. 281, 284) are present from the first setiger, accompanied by simple, 

 bilimbate setae and 3 or 4 yellow acicula. A twelfth parapodium has the 

 structures as shown in pi. 13, fig. 281. Composite setae continue through 

 about 23 to 29 setigers ; in the next few segments, that is, about setigers 

 24 to 29, the middle part of the fascicle contains, in addition to a few 

 composite pointed setae, one or 2 composite hooks; the inferiormost and 

 superiormost setae are simple, pointed. Thereafter, composite setae are 

 completely replaced by simple, hooded hooks (pi. 13, fig. 283). A pos- 

 terior parapodium is shown in pi. 13, fig. 282. Slender, bilimbate setae 

 persist through a few more segments, but are absent in median and pos- 

 terior segments. A small notopodial papilla is visible just above the dorsal 

 base of the parapodium throughout the length. 



Mandibles are very long, slender, fused for nearly their entire length, 

 the sides nearly parallel except for the broadly flaring distal end (pi. 13, 

 fig. 280). Maxillae (pi. 13, fig. 279) have long, broad carriers, about 

 twice as long as wide; forceps (maxilla I) are falcate; maxilla II has a 

 broad, brown, chitinized base, articulating with the main toothed piece, 

 which has 5 teeth on either side; maxilla III has a broad edge, provided 

 with several (4 or 5) minute dentations on the cutting edge; maxilla V 

 has a single tooth on either side. 



This was originally designated L. brasiliensis Grube (?) by Kinberg 

 (1865, p. 570) and briefly described as follows: "Lobus cephalicus ro- 

 tundato-elongatus ; segmentis buccalibus longior, quorum anterius est 

 posteriore longior. Maxillae pan's II: i 4-dentatae, paris IV: i 1-dentae; 

 pedes prominentes apice elongato; setae limbatae: simplices et articu- 

 latae." In our specimen, maxilla II has 5 teeth (not 4) on a side; the 

 proboscidial armature of the type specimen in Stockholm is no more 

 available ; since the distalmost tooth in ours is smaller than the others, it 

 is likely that the original describer might have overlooked it. Kinberg 

 obviously saw the articulate limbate setae, but, in so far as I am aware, 

 this character has not been recorded for any species since described. I am 

 referring the single specimen from Tobago to the Brazilian species chiefly 

 because of this unique feature. 



