Polychcetous Annelids from Florida, Porto Rico, Bermuda, etc. 263 



FAMILY LEODICID^E. 



Lumbrinereis cingulata n. sp. 



An unusually small representative of this genus, the largest individuals 

 being not over 40 mm. long with a prostomial width of 1 mm. The type 

 after preservation was 37 mm. long and had 98 somites. 



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

 than its breadth (plate 2, fig. 7). There are no eyes, but some individuals 

 have two relatively rather large pigment patches near the anterior border. 

 The head, both dorsally and ventrally, is thickly studded with minute tuber- 

 cles, clearly seen only under rather high magnification. These appear dark 

 by transmitted, white by reflected light. 



The first two somites are about equal in size (with tubercles similar to those 

 on the prostomium), and each marked dorsally by two prominent bands of 

 pigment spots. On later somites the tubercles are present, but except on the 

 last two somites are less numerous than anteriorly. Anteriorly the somites 

 behind the second have a narrow transverse band of pigment spots with occa- 

 sionally much fainter bands at the margins of the tuberculated areas; they 

 disappear entirely after the thirtieth somite. Ten or more of the most pos- 

 terior somites have prominent ventral pigment patches which fuse to form a 

 line that is wider in the center of each somite than intersegmentally. The 

 body is very soft and easily broken, and secretes large amounts of mucus when 

 put in clean water. There are two pairs of stout, unequal anal cirri. 



The parapodia are similar throughout the body. Each (plate 2, fig. 8) has 

 an anterior and a posterior lobe, the latter much the larger. I was unable to 

 find any aciculae. Setae of two kinds. In the anterior somites the most 

 prominent are the winged variety (plate 2, fig. 9) ; each has two winged pro- 

 cesses and its axis is drawn out in an acute point, often much longer than in 

 the one figured. At the sixteenth parapod in two specimens I examined (I 

 am not sure that this is a constant position) the winged setae disappear and 

 hooded forms (plate 2, fig. 10) take their place. In most cases it seemed as 

 if only winged ones were present in anterior somites, but in the fifth para- 

 podium of one specimen was one hooded form which barely protruded from the 

 surface. 



The maxillae (plate 2, fig. 11) are dark in color. The base is roughly tri- 

 angular, very dark brown, with lighter margins. Basal portion of forceps 

 rather broad and long, extending fully half the length, terminal portion slender 

 and curved. A dark-brown pigment covers the terminal portion and con- 

 tinues as a dark margin along the inner edge of the basal portion, the remain- 

 der of the forceps being much lighter in color. The large paired plates have 

 each 5 large, dark-brown teeth, the remainder being colored like the lighter 

 part of the forceps. Of the two pairs of distal paired plates, the first has 

 3 teeth, the second 2; each is continued laterally into a chitinous plate dotted 

 with black. The left-hand plates in the figure have been turned over. The 

 mandibles are very delicate and difficult to separate from the maxillae; they 

 are nearly transparent, the only definite pigment being a dark spot on each 

 near its outer anterior angle. The terminal beveled plate is not divided in 

 the middle line. (Plate 2, fig. 12) 



Collected at the Tortugas, where only 3 individuals were found, living in 

 the crevices of broken coral, which make up a coarse gravel on parts of the 

 bottom about 12 miles south of Loggerhead Key. They were common in 

 Bermuda, living in the crevices of the porous surface of coral rocks, just below 

 low-water mark, and some were found in a sponge. The type is from Bermuda. 



Type in the American Museum of Natural History. 



