A^melida of the Bermudas. 663 



slender, cirriform branchite; they arise, close together, on the dorsal 

 surface of the front of the 1st distinctly setigerons segment; a few 

 small setae occur on the branchial segment. Capillary dorsal setfe 

 are borne by at least 17 segments (the posterior segments are want- 

 ing). Series of ventral uncini begin on about the 3d setigerous 

 segment ; all simple. The uncini are rounded basally and have no 

 lateral tubercle ; apical denticles few, A large semicircular lip pro- 

 jects strongly. 



Prototlielepus tenuis, sp. nov. 



The two branchiae are very long and slender, about 6 times as 

 long as the diameter of the body, about equal to the cirri in diame- 

 ter, and crenulated on the anterior side. Edge of buccal collar 

 nearly even, or slighth^ crenulated; it has a few small, irregular 

 pigment-spots that may be the remains of ocelli. The cirri are 

 numerous, long and slender, strongly crenulated. 



The dorsal fascicles contain 8-12 setfe, which are distinctly lanceo- 

 late, bilimbate, minutely denticulate, acuminate, with slender tips; 

 those of the first fascicles are smaller, shorter, and less flattened ; 

 those on the bi'anchial segment are almost rudimentary. A few 

 small capillary limbate set?e occur on the 21st segment. 



The uncini form short rows of 8-10 on the 3d setigerous segment. 

 They increase gradually in number and form a simple row of 14-17 

 on segments 20-21 ; they are short, with a rounded incurved base 

 and obtuse angles, and have two or three small apical hooks; the 

 large rostral one is strongly incurved, nearly as long as the basal 

 plate; the others are much smaller, being closely appressed to the 

 primary one. In a top-view there are 3 series of small apical denti- 

 cles, with 1, 2, and 3 ; or 1, 2, and 5 ; the last are very minute. 



Length of the type (with only 21 segments remaining) about 

 15"^". 



Nicolea modesta, sp. nov. 



A small, slender species with two pairs of small, slender, sparingly 

 branched, stipate branchire; the second one smaller. The first seg- 

 ment forms a low collar, slightly scalloped dorsally, and with two 

 rounded lobes on each side; it has a row of small ocelli. 



There are 17 setigerous segments, and about 34, more posterior, 

 which carry rows of uncini. The setae begin on the 2d branchial 

 segment; uncini begin on the 2d setigerous segment; they form long 

 simple rows, turned forward, on the first six segments, but on several 



