SYUAS REMEX. 175 



Syllis REMEX, sp. nov.^ 

 Plate 21, fig. 5; Plate 22, fig. 4-6. 



Epitokous Stage. 



The general color is deep brown, with the midventral line paler. The 

 neurocirri are colorless. The setae are colorless and transparent. 



A broad, strongly flattened form from which the prostomial appendages 

 and the notocu-ri have been lost. The body is widest near the beginning of 

 the second thii'd of the length and is strongly narrowed cephalad, the anterior 

 end being very narrow and more gradually caudad, with the caudal end also 

 pointed. The greatest width, exclusive of the parapodia, is 1.5 nun. ; inclusive 

 of the parapodia 3 mm., and to the tips of the longer setae about 5 mm. The 

 length is 30 mm. Total number of somites ninety-four. 



Eyes on each side partly fused, the one directed ventrad, the other dorsad; 

 eyes large. Prostomium deeply incised caudad along the median line between 

 the eyes. 



Tentacular cirri two pairs, very short. 



The parapodia in the middle region of the body are long, flattened in the 

 anteroposterior direction and deep dorsoventrally at base, narrowing toward 

 the tip. Each presents distally a rounded prominence dorsaUy and a slender, 

 subcorneal, ventral one protruding distinctly beyond the other. The ventral 

 lobe bears on its ventral side and near the tip a short, jointed neurocirrus. The 

 notocirrophore is near the middle of the length of the dorsal surface and well 

 toward the caudal edge. (Plate 21, fig. 5). In the anterior region the parapodia 

 become progressively shorter and thinner, with the dorsal distal lobe reduced 

 and not evident as such on the first three. At the same time on the most ante- 

 rior parapodia the notocirrophore is shifted farther proximad, on the first one 

 lying at the base. The notocirrophores of the fu'st pair of parapodia are much 

 larger than the others probably in correspondence with much more elongate 

 styles. 



In a typical parapodium from the middle region of the body the setae arising 

 from the dorsal tubercle are niunerous, long and crowded. They appear char- 

 acteristically much flattened and thin in one direction, and expanded in the other 

 so as to be easily bent and broken. The tip of each is narrowly rounded, not 



• remex, an oarsman. 



