346 PROCEEDINGS OF THE ACADEMY OF [April, 



merit. The first has a complete circle of brown round a white center. 

 Under the microscope the surface shows close and curious fine pencil- 

 like white markings (fig. 15 a ) usually wavy or crenulated and often bent 

 or branched, having somewhat the appearance of written characters. 

 The branching of the nerves from the scar is also very obvious. 



Acicular single in each ramus, the notopodial very small and its 

 acute tip projecting freely from the end of the acicular process; neu- 

 ropodial very much stouter, its tip just appearing at the surface 

 ventrad and proximad to the tip of the acicular process. 



Notopodial seta? (PI. XXVIII, fig. 17) forming a whorl, few, short, not 

 reaching to level of tip of neuropodium, about as stout as neuropodials, 

 colorless or pale yellow, scarcely curved, tapered, blunt-pointed, the 

 distal half marked with numerous, fine, close combs, which become 

 longer distally and reach nearly to the tip. As usual the dorsalmost 

 are stouter, shorter and more curved. Neuropodial setae ( PI. XXVIII, 

 fig. 16) in three supra- and eight subacicular series, colorless, slender 

 and rather long, with the distal enlargement short and strong except 

 on the ventral rows; marked with twelve (dorsalmost) to twenty-two 

 (veiitralniost) pairs of pectinated plates which are closely appressed, 

 the longer proximal ones being finely divided, the distal becoming 

 shorter and nearly entire, the last very close to the accessory tooth; 

 smooth tip very short, ending in a short, strongly hooked, claw-like 

 tooth and an almost equally prominent and strong accessory tooth. 

 On II the neuropodials are much smaller and more slender and nearly 

 like the notopodials. 



Dorsum olive green, venter gray; prostomium purplish, a dorso- 

 lateral area overlooking the anterior eyes pale; tentacular cerato- 

 phores brown, the base of the lateral styles also brown; palps and 

 tentacular cirri unpigmented; lips and facial ridge slightly brown or 

 colorless; parapodia uncolored; notocirrostyles with basal half brown, 

 sometimes marked by a white ring, and distal half also white; neuro- 

 cirrostyles brown with white tip and often a white ring or spot above 

 base. 



Stations 4,452 (type), Monterey Bay, Point Pinos Light, 49-50 

 fathoms, green mud and fine sand; 4,460, same, 55-167 fathoms, 

 green mud, gravel. 

 Harmothoe triannulata sp. dov. PI. XXIX, figs. 18-22. 



A species of neat and trim appearance, more slender than H. imbri- 

 cata, about as depressed as that species and on the whole resembling 

 it. The four known specimens are all small, the largest being 17 mm. 

 long; the tpye is 12 mm. long; maximum width of body 1.4 mm.; 



