114 Thirty-second Report on the State Museum. 



in front of it, strongly concave ; posterior margin slightly convex ; anterior mar- 

 gin interrupted by the emargination which divides the apex into two bluntly 

 rounded lobes ; length to width as two to three. 



Antennae widely separated at origin, conical, length to length of head as two 

 to three. 



Palpi very stout, with long terminal articles. Eyes circular, lateral ; ante- 

 rior pair quite large, situated just back of the middle line ; posterior about 

 one-half as large as the anterior, and a little within them, very near the poste- 

 rior margin. 



Buccal segment equal in length to the three following segments taken 

 together ; much wider than the head. 



Tentacular cirri short, tapering but little, arising from stout cylindrical basal 

 articles ; upper posterior cirrus reaches to the middle of the third segment, or 

 to the front margin of the fourth ; the lower posterior and upper anterior cirri 

 equal, about two-thirds as long as 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 situated 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 respects similar to the 

 feet immediately following them. 



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

 lingulae 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 ven- 

 tral 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. 



Setae of three forms : those of the first form (fig. 38) have the terminal 

 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 terminal points of the stem not in the same plane 



