1911.] NATURAL SCIENCES OF PHILADELPHIA. 245 



neuropodial subacicular fascicle two or three homogomphs and five or 

 six heterogomphs like the above, together with a few heterogomphs 

 with longer appendages. On middle segments the number of homo- 

 gomphs increases, but the heterogomphs become stouter and fewer. 

 By about XXXIX the slender notopodials are replaced by two stout 

 homogomphs with short, stout, fusiform, nearly buried appendages. 

 A specimen from station 4,425 has the parapodia longer with more 

 pointed linguke than usual and the characteristic notopodial setae 

 apparently wanting, but in all other respects, including the paragnaths, 

 is typical. 



Several from station 4,496 have the color pattern well-preserved. 

 The anterior end is ashy, marked with brown spots and streaks gradually 

 fading out and disappearing at about XVIII, beyond which the cuticle 

 exhibits a conspicuous iridescence on a pigmentless integument. A 

 large triangular spot (formed of a central and two lateral lines) occupies 

 nearly the entire dorsum of the prostomium with its base resting on 

 the eyes. The segments are marked by a central transverse dash, 

 a pair of paramedian dashes near the anterior end, a similar pair near 

 the posterior end, and a pair of lateral spots. On the first few segments 

 the anterior and posterior pairs of spots tend to unite into two lines. 



Of greater interest are five male specimens in the epitokous phase, 

 hitherto unknown, taken at station 4,355. All are small, varying 

 from 17 mm. and 54 segments to 28 mm. and 67 segments. In the 

 latter the anterior region is 10.6 mm. long. In all cases the anterior 

 region has 14 setigerous segments besides the apodous peristomium. 



Prostomium of the general form seen in the atokous phase, but 

 rather shorter and more broadly rounded anteriorly and strongly 

 bent ventrad so that the anterior eyes lie rather more than half beneath 

 the posterior. Eyes of each side coalesced, but not especially enlarged, 

 each being little more than one-fourth the prostomial width. Both 

 have large lenses, the ventral looking ventrad and laterad, the dorsal 

 dorsad and laterad. Tentacles about three- fourths as long as prosto- 

 mium, but ventrad and regularly tapered. Palps directed ventrad, 

 short, scarcely more than one-half length of prostomium, basal seg- 

 ment stout, distal minute. 



Peristomium obscurely biannulate with a narrow, feebly separated 

 anterior ring. Tentacular cirri all short, rather distinctly but irregu- 

 larly articulated; posterior dorsal reaches to V, anterior dorsal to 

 beyond middle of III, and the two very short ventral cirri scarcely 

 beyond the anterior border of II. On the largest specimen, which 

 has the anterior segments more extended, the cirri are relatively 

 shorter. 



