1910.] NATURAL SCIENCES OF PHILADELPHIA. 349 



distance of about one and one-half to twice the diameter of the seta 

 and terminates in a slightly curved point and slender appressed acces- 

 sory process, which is absent from the ventral row or two. Notopo- 

 dial setse moderate in number, short, forming an inconspicuous de- 

 pressed whorl, short, very pale yellow, little stouter than neuropodials, 

 gently curved, with numerous, and close (3j to 3|- in space of diameter 

 of seta), rather conspicuous (especially on dorsal setse) transverse 

 pectinae leaving a rather long, blunt, smooth tip not less than the 

 diameter of the seta (PI. XXIX, fig. 22). Setse not elongated caudally. 



Elytra (PI. XXIX, fig. 20) completely covering dorsum of all but 

 five or six posterior segments, the first nearly circular, the others 

 broadly elliptical with a slight antero-marginal concavhy. Scar 

 antero-lateral of center. Except for a very small naked area at the 

 antero-medial margin the entire surface is studded with small horny 

 cones or blunt, rough tubercles which become somewhat larger latero- 

 caudad where the margin bears a sparse fringe of rather short cilia 

 with slightly bulbous ends, a few short ones of the same kind being 

 scattered over the surface back of the border. Along the margin 

 there is also usually one or a few small, soft papillae like those of H. 

 imbricata but usually ovate (though in one specimen they are rod- 

 shaped) and scattered over the entire surface posterior to the scar. 



Colors pale and delicate on these specimens, the dorsum generally 

 colorless or white, the median field quite unspotted anteriorly in the 

 proboscidial region but generally with a more or less evident trans- 

 versely elongated brown spot near the posterior margin of middle and 

 posterior segments. On each side of each segment is a somewhat 

 V-shaped brown spot, the apex of which covers the dorsal tubercles 

 and the anterior face of the elytrophores. On the most pigmented 

 segments two small brown spots may occur at the base of, but not on, 

 the cirrophores. On the exposed caudal segments these several spots 

 tend to merge. Parapodia, elytrophores, notocirrophores, neurocirri, 

 anal cirri and venter uncolored. Prostomium slightly purplish or 

 pink, probably brightly colored in life but not pigmented; eyes black. 

 Styles of median tentacle, tentacular cirri and notocirri white with 

 three pale brown but obvious bands at the base, the proximal and the 

 distal ends of the subterminal enlargement. Lateral tentacles, facial 

 ridge, nephridial papillae and lips pale brown; palps uncolored or 

 dusky. Elytra delicately blotched with somewhat irregular, con- 

 fluent pale brown spots on a colorless ground, the median and covered 

 portions and lateral border being free from pigment and the deepest 

 •coloration occurring over the point of attachment behind which is a 



