LEODICID.E OF THE WEST INDIAN REGION. 97 



figure 347) have narrow necks and heads with four teeth, covered by a hood which 

 extends for a considerable distance down the shaft. The posterior setae (text-figure 348) 

 have nearly straight shafts with narrow necks and terminal teeth, of which the one on 

 the convex side of the shaft is the largest. The apex is covered by a short hood. 



The maxilla (text-figure 349) has short, broad carriers, which in the specimen drawn 

 were slightly asymmetrical. The forceps is short and much curved. The proximal 

 paired plates have rough edges, but I could find no true teeth. Two pairs of distal plates 

 are semicylindrical in form and vary in appearance with their position. They are 

 drawn as they appear in the normal dorsal view. The inner faces are without teeth and 

 represent the median margin of the half-cylinder. The mandible (text-figure 350) is 

 fused throughout practically its entire extent and is very broad in comparison to its 

 length. The beveled portion is marked with dark concentric lines. 



L. Candida was collected in fine sand around plant roots in Buccoo Bay in April 1918. 

 They are very fragile and difficult to collect unbroken. Two entire specimens were put 

 in a dish of sea-water, but both were broken the next morning. The bottle labeled 

 "type" contains an anterior and a posterior end from this lot, but I can not be certain 

 that both came from the same individual. 



Type in the American Museum of Natural History. 



Lumbrinereis cingulata Treadwell. 



(Plate 7, figures 6 to 9; text-figures 351 to 356.) 

 Lumbrinereis cingulata Treadwell, 1916, p. 263, plate 2, figures 7-12. 



An unusually small representative of this genus, the largest individuals being not 

 more than 40 mm. long with a prostomial width of 1 mm. The type was 37 mm. long 

 and contained 98 somites. 



The prostomium, when extended, is broadly rounded, the length a little greater 

 than the breadth (plate 7, figure 6). There are no eyes, though some specimens show 

 near the anterior border of the prostomium two rather large brownish patches. The 

 prostomium is studded, both dorsally and ventrally, with minute tubercles, clearly 

 seen only under rather high power. These appear dark by transmitted but white by 

 reflected light (plate 7, figure 7). 



The first two somites are about equal in size, apodous, with tubercles similar to 

 those on the prostomium, and each is marked dorsally by two prominent bands of dark 

 pigment spots (plate 7, figure 7). The tubercles appear on all of the other somites, 

 though, with the exception of the last somite, they are less numerous than anteriorly. 

 The somites behind the second show a narrow transverse median pigment band with 

 occasionally a very narrow band at the anterior and the posterior margins of the somite 

 (plate 7, figures 6 and 8). These become fainter posteriorly and disappear entirely 

 toward the middle of the body. Ten or more somites at the posterior end have on their 

 ventral surfaces a band of black pigment which is broader in the middle of the somite, 

 but narrows in the intersegmental constrictions. The body is soft and easily broken 

 and secretes large quantities of mucus. There are two pairs of stout, subequal anal 

 cirri (plate 7, figure 9). 



The parapodia are uniform in character throughout the body, but relatively more 

 prominent in the posterior somites. Each has a prominent postero-dorsal and antero- 

 ventral lobe, the former much the more prominent (text-figure 351). I was unable to 

 find any aciculge. In the anterior somites the winged setse (text-figures 352, 353) were 

 the more prominent, though in the fifth somite of one individual I saw a hooded seta 

 which barely protruded through the surface. Behind the sixteenth somite only the 

 hooded setse (text-figure 354) appear, and posteriorly these become very prominent. 



