10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



the tentacles. A dorsal acicula comes to the surface at the base 

 of the dorsal cirrus and is surrounded by a tuft of setae. The 

 notopodial setae are straight with smooth margins and taper to a 

 blunt point. (Fig. 12.) The neuropodial setae widen toward the 

 apex terminating in an unsymmetrically bifid apex. The length of 

 the widened portion is least in the most ventrally placed setae of the 

 tuft. On the side of the seta corresponding to the larger terminal 

 branch are a number of slender teeth. A smaller number of some- 

 what larger teeth occur on the opposite margin. (Fig. 13.) 



The species was collected at Pango Pango, Samoa, in 1920. The 

 type is Cat. No. 19141 of the U.S.N.M. 



Genus HARMOTHOE Kinberg 



HARMOTHOE VILLOSA, new species 



The type is 15 mm. long. Owing to the peculiar bristly character 

 of the setae, measurements of the transverse diameter are hard to 

 make but from tip to tip of the setae is 5 mm. The prostomium is 

 not more than 0.5 mm. wide. 



The prostomium (fig. 14), has a length about equal to its width, 

 and its anterior margin is excavated for the cirrophores of the 

 tentacles of which the median fills rather more than half the space. 

 The posterior eyes are the smaller and lie near the posterior border 

 of the prostomium, while the anterior ones are situated on the latero- 

 ventral face just at the bases of the anterior peaks, and are visible 

 from above only as seen through the translucent prostomial tissue. 

 The lateral margins of the prostomium are smoothly rounded and 

 meet the outer margins of the anterior depression in blunt points. 

 If continued at their regular curvature they would meet one an- 

 other at the distal end of the cirrophore of the median tentacle. 

 This latter organ is short, and its style is about twice the length of 

 the prostomium, tapering very slightly to near the end and ab- 

 ruptly terminating in an acute point without any subterminal swell- 

 ing. The paired tentacles are in width and length less than half 

 the size of the median and arise partly ventral to it. They are 

 pigmented except for the terminal one-third. A similar pigmenta- 

 tion occurs on the basal joint of the median tentacle and there is 

 heavy pigmentation around the mouth. As a consequence the an- 

 terior part of the prostomium has a dark tint, shading back to about 

 the region of the anterior eyes. The tentacular cirri are about equal 

 to the lateral median tentacle in size and have very slight sub- 

 terminal swellings. At the bases of their cirrophores are masses of 

 pigment. The palps extend to about one-third of their length be- 

 yond the median antenna. Their surfaces are smooth, but all cirri 

 are thickly studded with villi. (Fig. 15.) 



