210 THE ANNELIDA POLYCHAETA. 



As a whole it is clearly longer above than the succeeding somites. On each 

 side it widens strongly, projecting forward beneath the eyes, as usual, and ven- 

 trally it is longer than the two succeeding somites combined, though shorter 

 than the three. The tentacular cirri are all short, strongly tapered to a point 

 distad, and varicQse, or imperfectly jointed, more distinctly so in the distal part. 

 The anterior ventral cirri are shortest. Each is attached in the exterior angle 

 between palp and elevated buccal border and reaches only to the second somite. 

 The anterior dorsal on each side is attached just above the ventral one and at 

 the posterior border of the anterior eye; it extends to the edge of the fifth 

 somite. The posterior ventral tentacular cirrus on each side is attached sUghtly 

 caudad of and on a level with the anterior dorsal, than which it is a Uttle shorter, 

 reaching to the fourth somite. The posterior dorsal tentacular cirrus on each 

 side is attached between the ventral one and the lower margin of the posterior 

 eye. It is the longest of the four, reaching to the seventh somite. The border 

 of the mouth is elevated excepting on the anterior side and is crossed radially 

 by sulci at moderate distances. (Plate 34, fig. 1). 



The metastomial somites of the anterior division are moderately convex 

 above and below. They are simple and entire, though a few of the more anterior 

 ones may show dorsally a weak transverse sulcus over the middle portion. The 

 first of these somites is shortest, the others increasing in length to the fifth, after 

 which they are nearly of uniform length. In the widest part of the division, e.g., 

 near the seventh metastomial ring, the width of each somite is about three and 

 one half times its length. The somites are all distinctly separated. In the pos- 

 terior division the somites are more depressed. The intersegmental furrows are 

 deeper above than below. The pygidium is short and broad, broadest at middle 

 of length, distad of which it is convex. The anal cirri are moderate in length, 

 slender, and tapered, and varicose. 



The parapodia of the anterior or nereid division of the body are biramous 

 and of the usual general character. They increase in length from the first to 

 those in the widest region of the body, those of the last few somites of the divi- 

 sion again decreasing. In the most anterior parapodia the neuropodium pre- 

 sents at the distal end a short and conical, distally rounded lobe, or ligula, ventrad 

 of the setae and a short, blunt acicular lobe. Caudad this lobe becomes stouter 

 and blunter. The first five parapodia lack notopodial acicula. Caudad the 

 notopodium relatively to the neuropodium becomes longer and longer, project- 

 ing much beyond the latter. On its dorsal side is a stout, subconical lobe which 

 does not extend as far distad as the acicular lobe. In the character of the noto- 



