No. 104.] 143 



the longest; lower anterior shortest, one-half as long as the 

 longest. 



Proboscis (fig. 33) without denticles (paragnathi) on the dorsal 

 surface ; my notes make mention of two minute fleshy papillae situ- 

 ated one on either side of the middle line of the basal ring, but I 

 cannot find them on the alcoholic specimens ; ventral surface of 

 maxillary ring also without denticles (fig. 34), while on the basal 

 ring are three small paragnathi, circular or elliptical, flat, corneous, 

 brown. 



The jaws are light horn-color with numerous long sharp teeth. 



Feet of the first two setigerous segments without dorsal rami, and 

 with the ventral cirrus much swollen at base (fig. 35), in other re- 

 spects similar to the feet immediately following them. 



Anterior feet (fig. 36), dorsal cirrus finger-shaped, longer than its 

 lingula ; lingulse and lips of the two rami tapering but little, nearly 

 cylindrical, very bluntly rounded externally ; upper lingula longer 

 than dorsal ramus ; dorsal ramus with anterior and posterior lips, 

 anterior shorter than posterior and above it ; lower ramus with a. 

 long posterior, short anterior lip ; lower lingula long, reaching nearly 

 to the outer end of the lower ramus ; ventral cirrus delicate, conical, 

 about one-half as long as its lingula. 



After the first third the structure of the feet changes gradually 

 (fig. 37); the upper lingula becomes conical, and further removed 

 from the upper ramus ; the anterior lips of both rami become much 

 smaller ; the lower lingula and the ventral cirrus do not change 

 much ; on the extreme posterior feet the dorsal cirrus is longer than 

 elsewhere. 



Anal segment simple ; anal cirri as long as the last eight segments; 

 filiform. 



Setge of three forms : those of the first form (fig. 38) have the ter- 

 minal points of the stem in the same plane, appendix very narrow ; 

 this is the only kind found in the dorsal rami ; they also form the 

 greater part of the upper bundle of the ventral rami, but are not 

 found in the lower bundles ; those of the second form have the ter- 

 minal points of the stem not in the same plane (fig. 39), appendix 

 short, in other respects like the first form ; found in both bundles of 

 the ventral rami, but not numerous ; those of th^ third kind (falcate 

 setje) are short (fig. 40), with a very short appendix, one mar- 

 gin of which is thickened and rounded, the opposite edge thin, and 

 deficient near the apex; a few of this form are found in the upper 

 bundle of the ventral rami, and they form the greater part of the 

 lower bundle. 



Body of uniform width along the anterior half, then tapermgvery 

 slowly. 



Color: body light flesh-color; sides of head and bases of antennae 

 and tentacular cirri dark reddish-brown ; one specimen was light 

 orange. 



Length of largest specimen, 26™"^; greatest width with feet, 

 3 5nim . number of segments, 105. Length of a specimen with TO 

 segments, 12™°^ . 



Very rare : 10 to 15 feet, shelly bottom. 



