LEODICE OLIGA PAPEETENSIS. 249 



practically if not quite obliterated on the last parapodia of the fragment. (Plate 

 55, fig. 10). Whether they appear again and increase in size farther caudad 

 can only be conjectured. 



The pectinate setae are very similar in general structure to those of 

 oliga; but the end-portion is larger and widens more strongly, though not 

 so abruptly as in makemoana. The compound setae are so far as can be 

 detected, identical in structure and size with those of the species. The dorsal 

 setae are capillary and drawn out to a very fine tip as in oliga. 



The right maxillae II have seven stout teeth, the left six. The right plate 

 of maxillae III have ten teeth and is paired with two plates on the left side, of 

 which the inner has eight teeth and the outer one seven smaller teeth. The 

 anterior border of the mandibles presents two rounded excisions as in the spe- 

 cies. 



Locality. Society Islands: Papeete. One incomplete specimen taken 

 on the shore, 9 November, 1899. 



The most obvious difference from the species is in the branchiae, which are 

 throughout shorter than the notocirri instead of greatly exceeding them in the 

 widest region of the body. They also seem to become obliterated toward the 

 middle of the body, whereas in oliga they remain well developed throughout. 

 The branched branchiae begin with the fourth and end with the fourteenth, 

 instead of beginning with the second and ending with the eighteenth, and these 

 seem to be uniformly bifilamentous instead of in considerable part trifilamentous. 

 The pectinate setae differ in form as above described. The teeth of maxillae 

 II and III differ in number. The constancy of these differences cannot be 

 correctly estimated until more abundant material of the two forms has been 

 studied. 



Leodice pauroneurata, sp. nov.^ 



Plate 57, fig. 8, 9; Plate 58, fig. 1-9; Plate 59, fig. 1-3. 



Dorsum brown, of a weak reddish tinge anteriorly, a paler band along each 

 side above parapodia; venter brown, paler along lateral portions, the parapodia 

 and adjacent lateral region being similarly light. Tentacles and cirri light 

 yellowish. Setae light yellow. 



Total number of somites present in type, ninety-seven. Total length, 42 mm. 

 Greatest width, exclusive of parapodia, 5 mm, 



Prostomium deeply retracted into the peristomium, the bases of the tenta- 



' rraOpos, small, few, and vtvpbv, filament. 



