PARONUPHIS SOLENOTECTON. 307 



of the frontal tentacles on the lateral edge of the prostomiuin, a little higher 

 than the frontals. They are short, reaching only upon the first parapodiferous 

 somite or to the beginning of the second. Ceratophores about equalUng the 

 frontal tentacles in length but more slender, obscurely four-ringed, or nearly 

 smooth; style smooth, gently tapering, tip not fine. Posterior paired tentacles 

 on each side situated a little above lateral edge of prostomium, immediately 

 back of paired tentacle and in contact, or nearly in contact with it. Cerato- 

 phore of essentially the same size as those of anterior pair, smooth, or but very 

 obscurely few ringed; style slender, subulate, smooth, reaching to or beyond 

 somite V, its tip in all types examined being broken off. The median tentacle 

 is located caudad of the middle line ; its ceratophore is much longer and stouter 

 than those of the paired tentacles; it is similarly nearly smooth, a few annuli 

 being but vaguely indicated ; style correspondingly stouter and longer than that 

 of the paired tentacles, reaching to and probably a little beyond somite IX, its 

 extreme tip in all types being broken off. The palpi are thick, fleshy, hemispheri- 

 cal lobes on the ventral side of the anterior portion of prostomium. No eyes 

 detected. 



Peristomium very short, being but slightly or not at all more than half as 

 long as the prostomium, conspicuously wider anteriorly than the prostomium, 

 the posterior sides of which it embraces; dorsum strongly convex; anterior 

 margin mesally gently convex. The cirri are attached on the anterior margin 

 widely apart; each is pale in color, regularly tapered to tip, and short, clearly 

 shorter than the distance to base of opposite cirrus and also shorter than the 

 prostomium. The lower lip is a large, smooth, and undivided transverse fold. 



The next succeeding somite (II) is much longer than the peristomium, being 

 about three times the length of the latter; it widens cephalad, extending out 

 somewhat at the sides to bear the long parapodia. Somite III of the same 

 general form as II, flaring cephalad, but clearly shorter. Somite IV is still 

 shorter, and V is intermediate between IV and the immediately succeeding short 

 somites, which do not differ much in length among themselves. Beginning 

 with about somite XIII the somites again increase conspicuously in length, in 

 the middle and posterior regions being nearly or quite half as long as wide. 

 Pygidium very small, subtriangular in outline. Anus a subdorsal sUt, the sur- 

 face through which it opens oblique. 



The first parapodia extend forwards and a little ectoventrad; they are 

 conspicuously long, their anterior ends being about on a level with the anterior 

 tip of the prostomium; proximally thickest, swollen and high above, narrowing 



