68 



LEODICID^ OF THE WEST INDIAN REGION. 



The posterior simple setse have long shafts, are widened toward the end. and this 

 widened portion is curved, denticulated along one edge, and tapered to an acute point 

 (text-figure 228). In anterior somites (text-figure 229) the denticulations do not appear, 

 but there is a narrow, obscurely striated fin. The pectinate setse have about 20 teeth, 

 the two terminal ones much longer than the others (text-figure 230). These reach their 

 greatest development toward the posterior end, where they are arranged in bundles of 

 20 or more lying dorsal to the acicula and ventral to the post-setal lobe. The com- 

 pound setse (text-figure 231) have stalks of varying length, their apices sUghtly swollen 

 and bent, the terminal joint with an apical and subapical tooth covered with the usual 

 hood. 



Throughout the greater part of the body the aciculse (text-figures 225, 227) are dark- 

 colored with lighter lateral margins, but anteriorly they are much lighter in color. They 

 are rather large and in both the dorsal and ventral ones the end is entire and not toothed 

 (text-figure 232). 



234 



232 227 " 233 



Text-figures 224 to 234. Marphysa regalis Verrill. 



228 



224. First parapodium x30. 



225. Thirty-fifth parapodium x30. 



226. Tenth parapodium x30. 



227. Parapodium from body behind guls x30. 



228. Posterior simple seta x394. 



229. Anterior simple seta x394. 



230. Pectinate seta x394. 



231. Compound seta x394. 



232. Acicula x394. 



233. Maxilla xl2. 



234. Mandible xl2. 



