Annelida of the Bermudas. 625 



«ides rounded, but narrowing backward, posterior margin cordate- 

 emarginate in the middle. Eyes 4, rather large, nearly black, placed 

 in advance of the middle, nearly in a transverse row, the posterior 

 ones being ^ smaller and a little farther back, distant less than 

 their diameter from the others. Palpi broad, obtuse, with the inner 

 edge incurved and the ends usually bent downward, the free part 

 about as long as the head. 



The tentacle is short, tapered, scarcely longer than head, reaching 

 but little beyond the ends of the palpi, basal part not beaded, the 

 two or three distal beads more evident. Antennae like the tentacle, 

 but shorter. 



Tentacular cirri are large, but not very long, scarcely tapered ; the 

 upper one is about ^ longer than the lower, composed of 14 annuli, 

 the distal ones being nearly as long as broad, and separated by deep 

 constrictions. The first dorsal cirrus is similar to, and about \ longer 

 than the upper tentacular cirrus, or about 1^ times longer than the 

 diameter of its segment; the second is less than ^ as long; the third 

 is longer than the first. Farther back the cirri are variable in length, 

 part of them being rather longer than the breadth of the body and 

 others not half as long, of about 10-12 annuli. The parapodia are 

 large and prominent ; the setigerous lobe terminates in two small 

 papillre ; the ventral cirrus is stout and nearly as long as the setiger- 

 ous lobe. 



The gill is present on all the segments ; beginning as a small 

 rounded lobe anteriorly, it increases to an ovate form a little farther 

 back ; along the middle region of the body it becomes much larger, 

 broad, foliaceous, with three or sometimes four lobes, becoming 

 more simple and smaller posteriorlv. The larger ones are as long as 

 the thickness of the parapodia and considerably wider. 



Setce are large and long. The compound ones, of which there are 

 usually 2 to 4, have a small and short incurved blade, wider at base, 

 with an acute, hook-like tip ; the length is about equal to the breadth. 

 With these there are one or two somewhat stouter, acute acicula, 

 with the tips slightly bent and projecting but little or not at all 

 beyond the setigerous lobes. 



The oesophagus is small, cylindrical, short, occupying 5 or 6 seg- 

 ments, light colored, cylindric, with a stout, conical tooth near the 

 dorsal edge ; the margin is indistinct, but appears to be finely irreg- 

 ularly denticulated. The stomach is thick, pale in color, and slightly 

 longer than the oesophagus, occupying 6 segments. 



