CIRRINERIS NESIOTES. 373 



CiRRINERIS NESIOTES, Sp. noV. 



Plate 70, fig. 5, 6. 



The general color of the body in the type is at present dark grey, of a some- 

 what greenish or brownish green cast. The branchiae are yellow. 



The body is relatively stout. It is widest at the anterior third or fourth, 

 from where the body narrows continuously caudad, the caudal region being 

 slender and subconically pointed. From the widest region the body narrows 

 conically cephalad. The number of setigerous somites is nearly 190. The 

 total length is near 55 mm. ; the greatest width, 6.25 mm. 



The prostomium is somewhat flattened, subtriangular in outhne, but with 

 the anterior end well rounded. Its surface is irregularly roughened with nodu- 

 lar elevations and depressions. There are some vaguely darkened areas and 

 many very fine dark specks, but whether these represent eyes or not cannot 

 be decided in the specimen as it is at present. 



The peristomium widens continuously caudad from the prostomium, with 

 which it forms a rather narrow cone. In length it is 2.2 mm., its width at base 

 being a httle greater, about 2.5 mm. Dorsally it is divided by transverse sulci 

 into seven or eight short, in part incomplete, bands or partial annuli, the surface 

 of which is broken up into numerous small areas by a reticulation of finer sulci. 

 The ventral surface is smoother than the dorsal. It shows three principal but 

 not clearly separated divisions. The border of the mouth is crossed by num- 

 erous, fine, radiating sulci, as usual. 



The first setigerous somite is longer than the succeeding, the second a little 

 shorter, the third and fourth further decreasing, while a considerable number of 

 those iromediately following are extremely short. Toward the widest part of 

 the body the segments increase very materially in length but are always propor- 

 tionately very short and closely crowded. In the widest part of the body the 

 width of a somite is eighteen or more times the length. Dorsally the first 

 and second somites are roughened by reticulating sulci like the dorsum of the 

 peristomium, the succeeding segments quickly assuming a smooth condition. 

 The setigerous segments are all distinctly separated from each other and are 

 undivided. 



The branchiae when fully extended have a maximum length of about 10 

 mm. In the preserved specimens they do not curl spirally, but remain extended 

 or irregularly bent. They occur on all segments nearly to the caudal end, or 

 excepting on the last seven to ten. They are of the same stoutness posteriorly 

 as anteriorly, or nearly so. The ordinary branchiae are inserted a httle above 



