92 



LEODICID^ OF THE WEST INDIAN REGION. 



along its dorsal surface to the parapodium (text-figure 325). The dorsal cirrus becomes 

 more slender in these later somites, in which there is a single acicula, its blunt end pro- 

 truding between the parapodial lobes. At about somite 35 a second (ventral) acicula 

 makes its appearance (text-figure 326, a parapodium from somite 70). Behind the 

 region of somite 35 the cirri resemble those of figure 326. 



The setse are uniform in character throughout the body. The compound seta 

 (text-figure 327) has the apex of the basal portion enlarged and finely denticulated, 

 while the terminal portion is short, with three teeth of nearly equal size, and is covered 

 with a finely denticulated hood. There are two forms of simple setse (text-figures 328 

 and 329). One is long and slender, rather sinuous in outline, with numerous fine mark- 

 ings along either side; the other is shorter, expanded at the end and narrowed abruptly 

 to a very acute point. Its concave margin is bluntly denticulated. The pectinate 

 setae (text-figure 330) have about ten teeth, the two terminal ones longer than the others. 



The maxilla (text-figure 331) is light brown, with darker patches between the two 

 portions and along their inner edges. The carrier is rather short and the forceps rela- 

 tively heavy. The proximal paired plate on the left has 4 teeth, that on the right has 

 6, and the distal paired have 8 and 5 on the right and left sides, respectively; the 



Text-figures 324 to 332. Nicidion kinbergii Webster. 



324. First parapodium x66. 



325. Tenth parapodium x66. 



326. Seventieth parapodium x66. 



327. Seta of first parapodium x387. 



328. Seta from middle of body x387. 



329. Seta from first parapodium x377. 



330. Pectinate seta x387. 



331. Maxilla x34. 



332. Mandible x34. 



