LEODICE NESIOTES. 253 



teeth a smooth, straight edge about equal in length to the dentigerous portion. 

 (Plate 58, fig. 4). Maxillae III with margin crenate, the teeth being small and 

 marginally rounded; left plate with eight teeth, right with ten. The unpaired 

 plate not detected. Mandibles with masticatory plates large and white. Each 

 is obliquely subovate, with the outer end rather narrow; anterior edge not at 

 all dentate and outer end not incised. Stems of mandibles blackish; nearly 

 straight, being but slightly cui-ved caudally; conspicuously narrowed caudad, 

 the caudal ends narrow and subacutely pointed. (Plate 58, fig. 2). 



Locality. Off Galapagos Islands: Sta. 3401 (lat. 0° 59' S., long. 88° 58' 

 30" W.). Depth 395 fms. Bottom, Globigerina ooze. Bottom temp. 43.8° 

 F. 28 March, 1891. One specimen containing eggs in posterior segments. 



While this species is Uke L. contingens, L. nesiotes and others of the same 

 group in bearing branchiae continuously to or nearly to the caudal end of the 

 body, it differs from them in having the branchiae rather arbuscular than pin- 

 nate and in the much reduced number of the filaments. The species has points 

 of resemblance to the wide-spread L. vittata (Delle Chiaji). In the latter species, 

 however, the branchiae begin much farther forward (somite V). The branchiae 

 also are much larger than the much reduced ones of the present species and the 

 filaments are more pinnate in arrangement. Its crochets differ in structure, as 

 do the compound setae in some details. The first maxillae differ conspicuously 

 in form, having the carriers strongly narrowed caudad, subtriangular, instead 

 of being expanded semicircular ly in this region. 



Leodice nesiotes, sp. nov.^ 

 Plate 57, fig. 6, 7. 



Color brown of dilute chestnut cast, darkest along middorsal line. Tenta- 

 cles, parapodia, cirri, and branchiae paler, more yellowish. 



The caudal end of the type is missing, so that the total number of somites 

 is uncertain. There are in the incomplete specimen one hundred and one somites. 

 The length is 90 mm., and the greatest width, exclusive of the parapodia, is 5 mm. 



Prostomium short, narrower than the peristomium; deeply vertically 

 incised in the median line in front; each half very obUque, conspicuously 

 wrinkled; the anterior surface deeply depressed so as to leave a higher dorsal 

 wrinkle and a ventral marginal ridge. Tentacles of tvpe rather irregularly 



' vqaiuiT-r)';, islander. 



