26 



LEODICID.E OF THE WEST INDIAN REGION. 



shown in text-figure 536. The setal lobe is small and conical and there are two aciculae, 

 the dorsal one the heavier and rounded at the apex (text-figure 53d), while the ventral 

 one has a terminal and subterminal tooth, the latter the larger, both covered by a 

 prominent hood (text-figure 53e). The base of the gill is heavy and carries the slender 

 cirrus on its outer margin. Beyond the insertion of the cirrus the gill divides into two 

 long, slender branches, more than three times as long as the cirrus. This form of para- 

 podium is continued to the extreme posterior end of the body, though in posterior 

 somites the ventral cirrus is much longer than it is in the middle region. In the region 

 of somite 70, as figured in text-figure 536, the ventral cirrus is small, on the end of a short 

 pad. Needle aciculse occur in the dorsal cirrus in all somites. 



The simple setae, especially toward the posterior end, are rather large (text- figure 

 53/) and each has a straight central shaft with symmetrical wings. In somite 10 the 



53 i 



TEXT-FIGURES 53a to 53j. Leodice spongicola. 



53a. Anterior end X12. 



536. Parapodium from region of seventieth 



somite X60. 



53c. Tenth parapodium XGO. 

 53d. Dorsal acicula from region of seventieth 



somite X250. 



53e. Ventral acicula from region of seventieth 



somite X250. 

 53/. Simple seta X350. 



530. Anterior compound seta X350 

 53h. Posterior compound seta X350. 



531. Maxilla X46. 



53j. One-half of mandible 



