320 ANNELIDA FROM BERMUDA. 



The first ten segiiicuts are rounded; tlicir length a little more, their 

 diameter a little less, than that of the segment ibllowing. After the 

 tenth segment the body is much depressed; very .sliglitlycouvex above, 

 flat below ; along the })osterior third the body is somewhat more convex, 

 and diminishes gradually in diameter. 



Length, 120'"'". 



Greatest width, 0'""'. 



Color (in alcohol), dirty white, somewhat iridescent. 



NICIDION Kinberg. 



NlCIDION KiNBERGI n. SJ). 

 (Plato XII, Figs. 81-d8.) 



This genus is represented in Mr. Goode's collection by a single speci- 

 men, of which the posterior segments are lost. What remained is in 

 good condition, and it seems desirable to describe it, as well a^s maybe, 

 because so few species of the genus have been found. 



The head (Fig. 81) is bi-lobed, convex above and at the sides; the 

 median antenna reaching back to the third segment ; the ])aired antennje 

 a little shorter than the median ; eyes small, circular, black, situated 

 back of the origin of the lateral antenna3. 



The buccal segment is nearly as long as the three following segments 

 together; the second segment perfectly well marked, as long as the 

 third ; the tentacular cirri were lost, merely a short basal part remaining. 



The dorsal cirri on the anterior segments are stout, irregularly and 

 bluntly conical (Figs. 82, 83); further back they become somewhat 

 smaller (Fig. 84). The ventral cirri on a few of the anterior segments 

 (Fig. 82) are as long as the dorsal, finger-sha])ed ; soon they become 

 much swollen at base (Fig. 83), and then fall oft" rapidly in size, being 

 hardly perceptible on the posterior segments of our fragment (Fig. 84). 



The capillary setfe are widened for a part of their length (Fig. 86), 

 and then drawn out into a delicate capillary termination. The com- 

 pound setaj have the form shown in Fig. 85. There are many comb-like 

 setiB (Fig. 87), with their teeth curved and prolonged, especially one of 

 the outer teeth. 



In the anterior feet there is a single stout acicula, straight, pointed, 

 slightly projecting; further back ai)pears a bi-dentate acicula, in the 

 lower part of the ramus (Figs. 84, 85). 



Body strongly convex above, flat or slightly concave below. 



