240 THE ANNELIDA POLYCHAETA. 



Bottom of green mud. Bottom temp. 40.6° F. 11 April, 1891. Two speci- 

 mens. 



This species in structure seems to approach Leodice indica (Kinberg) (L. 

 congesta (Marenzeller)) closely. The gills have nearly the same structure and 

 distribution, excepting that in the present species they begin farther forward 

 (somite V) than usual in indica (usually somites VII to X, but rarely farther 

 forward). The anterior apodous somites and the tentacles and cirri of the two 

 species are very similar excepting in a few points, such as that the inner lateral 

 tentacles are relatively longer. The present species, however, is a much larger 

 and more robust form, with a strongly marked color-pattern which indica lacks. 

 The jaws are larger and coarser; the carriers of the forceps are more uniform in 

 width, not bulging caudally ; the parts of maxillae II on the left side have more 

 numerous teeth, with those of the outer piece stouter and seven in number as 

 against ten on the inner, whereas in indica the numbers are more nearly equal in 

 size and number (six and seven respectively in Marenzeller's type). The cro- 

 chets seem also to cUfTer in the form and direction of the teeth. 



Leodice lita, sp. nov.^ 

 Plate 54, fig. 6-10; Plate 55, fig. 1-7. 



The general color is dull greyish brown, uniform above. Ventrally there 

 are in the anterior region, but not in the median and posterior, three distinct 

 longitudinal white stripes of which the median is fully twice as wide as the lateral ; 

 each lateral stripe runs close to the bases of the neurocirri. The tentacles, 

 parapodia, and cirri are lighter than the body, but the contrast is not strong. 



The body from the region about somite XII narrows, strongly cephalad 

 and more gradually caudad, behind the branchial region becoming much more 

 slender, the caudal end rather abruptly subacute. Length about 80 mm., the 

 hardened and much coiled condition of the type making wholly precise measure- 

 ment difficult. Greatest width, exclusive of parapodia, 4 mm. Total number 

 of somites near two hundred and forty-two. The sexual region lies caudad of 

 the first one hundred and ten somites. 



The prostomium is of moderate length, nearly equalling the peristomium. 

 It is divided in front as usual by a vertical median incision. Each lobe is trans- 

 verse, with inner end thickest and surface but httle uneven. The tentacles are 

 arranged in a weakly curved transverse series with their bases in contact with 



' Xiros, simiile. 



