64 UNITED STATES NATIONAL MUSEUM BULLETIN 296 



were usually bifid, but were often three-pointed, with even four- 

 pointed teeth not uncommon. It is definitely the same species, however. 

 The internal anatomy is typical of the genus. The pair of mouth 

 cirri each possess two rami on a two-segmented protopod. The rami 

 have weak segmentation, appearing to be five and four segments in 

 the anterior and posterior ramus, respectively. The rami are well 

 equipped with setae which are not plumose. The four pair of terminal 

 cirri are diagnostic of the genus, mth typical setation: a pair of long 

 bristles (about four times as long as the segments) on the distal 

 inner curvature, and a pair of short bristles (about as long as the seg- 

 ments) "medially, on each segment, plus a single bristle located distally 

 on the outer curvature of fewer segments, up to four segments apart 

 (about 1.8 times as long as the segment). The segmentation of the 

 terminal cirri, for one southern Australia specimen, follows: 



Terminal 



cirrus: 12 3 4 



Ramus: 



Segments: 



That this number is dependent on maturation is indicated by one 

 smaller specimen, in which the anterior ramus of the first terminal 

 cirrus had 15 segments. 



A specimen from Kelletia lischkei from Japan had the following 

 segment count: 



Terminal 



cirrus: 12 3 4 



Ramus: ante- poste- ante- poste- ante- poste- ante- poste- 



rior rior rior rior rior rior rior rior 

 Segments: 16 23 33 38 39 41 35 44 



The one pair of caudal appendages follow the terminal cirri; they 

 are two-segmented, with terminal bristles which do not appear to 

 be plumose. 



The mouthparts are typical. The labrum is large and prow-shaped, 

 not unlike a knight's visor. The mandibles have three prominent 

 teeth with about four fine hyaline teeth and many bristles along the 

 cutting edge to a sharp posteromedial angle (fig. 121). The mandib- 

 ular palp is typical. The first maxillae have the typical few heavy 

 teeth (two prominent ones, plus a variable number of secondary 

 teeth and bristles) separated from a hillock of fine teeth and heavy 

 bristles by a diastema (fig. 12m). The apodeme is typical. The second 

 maxillae are typical. 



The esophagus leads dorsally from the mouth field, and bends 

 sharply posteriorly. The posterior part of the digestive tract often 

 bears a dark mass, probably representing indigested material. 



