HAKMOTHOE MARPHYS.E. 339 



The ventral bristles form two groups, a stronger upper series and a more slender inferior 

 group, both with longer and more tapered tips than the typical. The tips of most of the 

 upper series are spear-shaped, though in one or two a double contour is seen. The rows 

 of spines are boldly marked. The inferior group has very long tapering tips, which are 

 hair-like in their attenuation, and the spinous rows are finer than in the superior 

 bristles. 



In the third foot the dorsal bristles have increased in size and strength, and the 

 terminal bare region is more distinct. While the upper and lower ventral bristles have 

 simple tips, the median show bifid tips. The feet gradually assume the typical condition 

 as we proceed backwards. 



In the fully formed foot (Plate XXIX, fig. 15) the dorsal branch bears a series of 

 moderately elongate and stout dorsal bristles with closely arranged spinous rows, only a 

 short portion at the tip being smooth. The curvature is slight (Plate XXXIX, fig. 4). 

 The ventral bristles are of average length, the upper series with long spinous regions 

 and simple tips, the next with shorter spinous rows and bifid tips (Plate XXXIX, fig. 5). 

 The tips in the stouter forms are slightly hooked, and the secondary process comes off at 

 an angle. Only in the upper forms with the longer distal regions does the secondary 

 process form a small angle. At the ventral edge of the series the spinous region 

 becomes much shorter, but almost all are bifid. 



These bristles differ from those of HarmotJioe Haliaeti. 



The dorsal cirri are somewhat slender and elongate, with a slight swelling — marked 

 on each side by a brown bar below the long filamentous tip. They are sparsely covered 

 with clavate cilia, the longest of which scarcely attain half the diameter of the thickest 

 part of the cirrus. The posterior cirri are very slender throughout. The ventral cirri 

 are rather small and slender, and have a few short clavate cilia. 



Loxosomae occur on the skin of the dorsal division of the feet, and also on some of 

 the dorsal bristles (Plate XXXIX, fig. 6). 



8. Harmothoe marphysj:, Mcintosh, 1876. 



Specific Characters. — Head elongated, rounded in front, widest posteriorly. Eyes 

 small, the larger anterior pair further apart and situated laterally in front of the middle 

 line. Posterior pair in front of the nuchal collar. Median tentacle short, with clavate 

 cilia; lateral short, with filiform tips and a few clavate cilia. Palpi (in spirit) short and 

 stout, with delicately tapered tips. The tentacular and dorsal cirri are comparatively 

 short and slender, and the tips finely pointed. A few clavate cilia occur on the surface. 

 Body somewhat elongate, about three quarters of an inch, and with thirty-two to thirty- 

 three bristle-bearing segments. The feet increase in bulk after the twelfth (sexual). 

 Scales thirteen or fourteen pairs (it may be fifteen), smooth under a lens-, but under a high 

 power showing widely separated horny papillas. In shape they are rounded in front, 

 reniform or ovoid posteriorly. Dorsal division of the foot little developed, and the tuft 

 of bristles minute. Ventral bristles with short spinous regions and mostly with bifid 



