100 



LiEODICID^ OP THE WEST INDIAN REGION. 



extending beyond the parapodium for more than the length of the lobe, and about the 

 same number of compound setae, the latter of the peculiar form shown in text-figure 

 360. There are some chitinous rods in the interior of the parapodium, but I was unable 

 to determine whether they are aciculse or bases of broken seta?. Later somites differ 

 from the first only in the relative size of the posterior lobe. 



The tenth parapodium (text-figure 364) carries three kinds of setae. Two of these 

 are simple, each (text-figures 361 and 362) with a broad wing. Beside the simple setae 

 are compound ones (text- figure 360). The basal portion of a compound seta has a nar- 

 row, bluntly pointed apex which is in contact with the base of the terminal joint, but 

 elsewhere separated from it by a considerable distance. The terminal joint has a narrow 

 neck, with a large terminal tooth, a second smaller tooth dorsal to this, and a row of 

 minute denticulations beyond this. A hood covers both the terminal and the end of the 

 basal joints and is apparently a continuous structure, though there is a small indentation 

 opposite the end of the basal portion. 



In the posterior part of the body only one kind of seta occurs (text-figure 363), hav- 

 ing a very long shaft terminating in a narrow neck and bent head, the latter with one very 

 large tooth and a number of much smaller fine ones. A rounded but slightly asymmetri- 

 cal hood covers the apex. 



Collected July 21, 1914, at the Dry Tortugas. The specimen was a female with eggs. 

 It seems to be somewhat closely related to L. bidens of Ehlers (1887, p. 103, plate 31, 

 figures 7-17), but there are important differences in the form of maxilla and mandible. 



Type in the American Museum of Natural History. 



Lumbrinereis floridana Ehlers. 



(Text-figures 365 to 370.) 



Lumbriconereis floridana Ehler.s, 1887, p. 103, plate 30, figures 10-15. 

 Lximbriconereis floridana Treadwell, 1901, p. 198, figure 41. 



No drawings of the living animals were made. In alcohol the specimens are color- 

 less. The prostomium, seen from above, is semicircular in outline, and no eyes are 

 visible. The first parapodium is rather large, and later ones increase in size up to the 

 tenth, which is the largest. 



Text-pigures 365 to 370. 

 Lumbrinereis floridana Ehlers. 



365. Tenth parapodium x34. 



366. Compound seta x310. 



367. Simple .seta x232. 



368. Hooded seta xl94. 



369. Maxilla x20. 



370. Mandible x21. 



367 366 



