102 



LEODICID.E OF THE WEST INDIAN REGION. 



Anteriorly there are two kinds of bilimbate setae. The first are simple (text-figure 

 373), bent toward the apex and very sharp at the end, with a pair of broad wings along 

 the bent portion. (From a side view only one of these wings is seen.) The second form 

 is compound (text-figure 374), with the terminal joint long and slender, ending in a 

 narrow neck and recurved head, carrying at its apex a row of subequal teeth. There 

 is a slender fin, striated like that of the simple seta. On the side of the apex of the basal 

 joint is a similar but very short fin. 



Toward the middle of the body these setae disappear and their place is taken by a 

 longer and stouter seta (text-figure 375). This has a narrow neck, followed by a recurved 

 head, bearing one ventrally placed heavy tooth with two much smaller ones distal to 

 it, and terminating in a row of very small denticulations. The whole is covered by a 

 "hood" made up of the two fins, of which only one is shown in side view. 



The maxilla (text-figure 376) is very dark in color, the carrier short and broa"d, and 

 deeply constricted on either side. The forceps is slender and much curved. In both 

 specimens at my disposal they showed patches of much more transparent material near 

 the middle of their basal portion. 



The proximal plates have each 6 teeth, the following two pairs have 2 and 1, respec- 

 tively. In the figure these latter plates are inverted, the normal position of the teeth 

 being toward the median line. On either side, near the forceps, is a patch of pigment. 



The mandible is relatively very little bifid and is much lighter in color than the 

 maxilla (text-figure 377). The beveled portion is marked with concentric dark lines 

 which are much darker at their anterior ends; a lighter tint colors the spaces between 



TEXT-FIGURES 371 to 377. 

 Lumbrinereis nasula Verrill. 



371. First parapodium x60. 



372. Tenth parapodium x60. 



373. Simple seta x247. 



374. Compound seta x247. 



375. Posterior seta x247. 



376. Maxilla x27. 



377. Mandible x27. 



376 



373 



