LEODICE OLIGA. 247 



limbate; they are distally finely pointed and the apical portion is often curved. 

 The compound ventral setae are very much coarser than the capillary ones and 

 than the corresponding ones in E. makemoana. The shaft of each is long and 

 curved and at the end abruptly clavately widened as in makemoana. The 

 distal piece is bidentate; the special tooth is rather slender and is moderately 

 curved forwards; the subapical tooth is of moderate size, projects at right angles 

 to the axis and is farther distad than in makemoana; the piece gradually widens 

 proximad to the usual protuberance but does not have a distinct subbasal tooth, 

 from the protuberance narrowing to the point of attachment as usual. (Plate 

 56, fig. 4), The pectinate setae have stalks of moderate length; the distal end 

 is gradually clavately widened, the terminal piece being decidedly longer and 

 relatively narrower than in makemoana and with the processes more even, the 

 setae also being smaller. (Plate 56, fig. 3). 



Maxillae II with eight teeth on the right piece. Maxillae III of the right 

 side is a strongly curved plate bearing ten teeth ; this is paired with two plates 

 on the left side, the inner, more caudal, longer one of which has nine teeth, 

 the other eight. The stems of the mandibles are short, narrowed caudad as 

 usual, and well united anteriorly much as in the preceding form. The masti- 

 catory plates are white; they lie obliquely, their anterior margins making a 

 reentrant angle of nearly forty-five degrees ; the anterior margin of each has two 

 incisions dividing it into three rounded elevations or teeth; there is also a weak 

 indentation at the lower part of the outer end; the surface is striate. The blade 

 of maxillae are of the usual general form, appearing a little more abruptly curved 

 distally than in makemoana. The form of the carrier-plate could not be made 

 out clearly; but it seems to be narrower across the caudal end than in 7?iake- 

 moana, the form of which it approaches. 



Locality. Paumotu Islands: Makemo. One specimen from the coral 

 at the bottom of the lagoon, depth 13 fms., 19 October, 1899. 



This specimen represents a form undoubtedly close to makemoana. The 

 fact that the collection embraces only a single specimen of one species and an 

 imperfect one of the other, makes it very difficult to judge the extent of varia- 

 tion in characters and the precise relationship between the two. In the presence 

 of various important differences, however, the two forms must be held as dis- 

 tinct. The most obvious difference is presented by the branchiae. In the 

 present form these extend both farther forward and farther caudad, and in 

 particular an anterior group and a smaller posterior group are branched, pos- 

 sessing two and three filaments instead of all being strictly simple. The peri- 



