260 THE ANNELIDA POLYCHAETA. 



distally rather abruptly incurved and falciform. Maxillae II have the ecto- 

 caudal corners elevated as usual, but the elevated portion is short and rolled 

 in only a short distance. The right maxilla has eight somewhat recurved 

 teeth, of which the one at each end is reduced. The left has but five similar 

 teeth. The right maxilla III is a strongly curved plate bearing along its free 

 edge the teeth. It is paired with two plates on the left side, of which the more 

 anterior has but six similar teeth and the more posterior, lying close along 

 maxilla II, has seven larger teeth comparable to those of maxilla II. Maxilla 

 IV has a single tooth. 



Locality. Near Panama. Shore. Exped. 1891. One specimen. 



This species is at once separated from the widespread L. antennata Savigny, 

 which it in many ways resembles, and its near relatives in having the crochets 

 bidentate instead of tridentate. Aside from important differences in setae, 

 maxillae, etc., it differs fromL. multihranchiata (Moore) and L. nesiotes, sp. nov., 

 in having branchiae begin on somite VII instead of on IX, and also the first 

 branchia is composed of but a single filament instead of seven or more. In 

 the character of the branchiae and notocirri the species is very similar to L. 

 microprion (Marenzeller). It is like that species in the prevalence of four 

 filaments to the branchiae, in having the maximum number of filaments eight, 

 and in the general order in which reduction takes place. It differs in having 

 but one filament in branchia I instead of three and in having this on somite 

 VII instead of VI. It also differs conspicuously in the form of the carrier- 

 plate of maxillae I, which is relatively much longer and the sides of which are 

 nearly straight instead of being strongly incurved; the blades are much more 

 strongly curved as judged from Marenzeller's figure (Denskchr. K. akad. wis- 

 sensch. Math. nat. klasse, 1879, 41, p. 135, pi. 5, fig. Ic). Maxilla II of the right 

 side has eight teeth instead of five and the left side five in place of six, the contrast 

 between the sides being thus much more pronounced. The unpaired left plate 

 has seven teeth instead of but four, and the right maxilla III ten instead of but 

 seven, the left six instead of four. See also p. 256. 



Leodice contingens, sp. nov.^ 



Plate 57, fig. 1-5. 



The type is brown throughout, the color being nearly uniform and present- 

 ing no distinct markings. 



' contingcre, to border, touch. 



