16 



LEODICID.E OF THE WEST INDIAN REGION. 



and posterior lips of the setal lobe about equal in size, with two acicula? reaching the 

 surface between them. The gill arises from a broad base common to that of the dorsal 

 cirrus. Just at the base of the gill is a small brown spot visible only under considerable 

 magnification. 



A parapodium from the middle of the body (text-figure 15, drawn from a living 

 specimen) shows a relatively considerable increase over the tenth in the size of the dorsal 

 and ventral cirri, and the difference in size between the anterior and posterior lips is 

 more marked. In addition to the dorsal aciculse there is a ventrally placed hooked one. 

 All parapodia have a tuft of needle setse extending into the dorsal cirrus, though these 

 escaped the attention of the artist in making these drawings. In the middle of the body 

 there is a rather large brown pigment patch on the anterior face of the parapodium at 

 the base of the dorsal cirrus. 



The gills in the specimens in my collections appear first on the eighth or ninth 

 somite and in one from Beaufort, North Carolina, they begin on the seventh. The 

 first pair is small, with not more than 2 branches; the second has 8, the third 13. From 

 the tenth to the twentieth they are very prominent, sometimes with as many as 17 



16 



TEXT-FIGURES 13 to 20. Leodice rubra Grube. 



13. First parapodium x30. 



14. Tenth parapodium x27. 



15. Middle parapodium x20. 



16. Simple seta x350. 



17. Compound seta x350. 



18. Pectinate seta X350. 



19. Maxilla xlS. 



20. Mandible xlS. 



