LEODICE CONTINGENS. 201 



The number of somites in the type is one hundred and twenty-two, of which 

 the last thirteen are apparently regenerated. The total length, exclusive of 

 the anal cirri and the tentacles, is nearly 116 mm. Greatest width, exclusive of 

 parapodia, 6 mm., to tips of setae, about 9.2 mm. 



Prostomium broad, protruding laterad on each side; deeply sunken into 

 peristomium, the exposed portion short. Anteriorly deeply vertically incised, 

 leaving a thick palpus on each side. Palpi strongly diverging from above 

 ventrolaterad ; each slightly indented, presenting a smaller border above the 

 indentation and a larger thicker one below it. Tentacles arranged transversely 

 in a semicircle, the laterals on each side rather closer together than to the median, 

 the outer lateral inserted much farther forward than the inner. Tentacles 

 mostly smooth, or but vaguely wrinkled distally; each with a very short but 

 distinctly separated ceratophore; tips slender. Median tentacle reaching to 

 somite VIII; inner paired tentacles reach to somite VI; outer paired tentacles 

 much shorter, reaching only to the edge of somite III. 



Peristomium in length equalling the next three somites. Anterior border 

 indented on each side; below the indentation is the thickened lower lip, the 

 margin of which is concave and is crossed longitudinally by sulci, appearing 

 crenulate. 



Somite II apodous. Fused laterally with somite I, but again distinct ven- 

 trally. Cirri more slender than tentacles, long and subulate, reaching forward 

 to anterior third of exposed portion of prostomium; weakly wrinkled or annulate, 

 more distinctly so distally. Somites from III caudad bearing parapodia. All 

 regular and undivided. In widest part of body near six times wider than long, 

 while in the posterior region the width may be less than three and a half times 

 the length. Somites strongly arched above; smooth; ventrally nearly flat, 

 with the median neural furrow distinct but not deep. The body attains its 

 greatest width near somite XI or XII. It decreases in width very gradually 

 caudad to the posterior end, where it narrows more abruptly to a point. Pygi- 

 dium subtruncate; below the anus arise two smooth, subulate cirri 6 mm. long. 



Parapodia of the usual simple form, moderate in length. Neurocirri in 

 the anterior region with conspicuously thickened bases which in ventral view 

 are oblong in outline; the more slender tip is a short, bluntly conical process; 

 posteriorly the bases become less swollen and the apical portion more cylindrical. 

 Notocirri notably long, being in the anterior region four or five times as long as 

 the parapodium; smooth, tapering to a point distad. In the posterior region 

 the notocirri are more slender and are relatively longer. 



