LEODICE OLIGA. 245 



to the second or beginning of the third somite. It is thinner proximally than 

 the other and is relatively less attenuated distad. It consists of eight articles. 



The peristomium is as long as the next three and a half somites. The dorsal 

 surface is smooth, or essentially so, showing but a few fine punctae and some very 

 fine curving impressed lines. The anterior margin above is straight or slightly 

 indented at the middle; the sides are not incised and there is but a fine weak longi- 

 tudinal sulcus crossing the peristomium on each side. From near the anterior 

 margin on each side a wide furrow runs ventrad and then convexly mesocaudad, 

 setting off an elevated anterior border and the median area or lower Up. The 

 anterior margin of the lower lip is widely and not deeply concave. 



The second somite is distinct below and above but is fused laterally with 

 the peristomium in the more common way. Each tentacular cirrus is a slender, 

 tapered process extending about to the transverse sulcus in front of outer paired 

 tentacle; it is strongly annulate, the articles being short, distinct, and eight in 

 number. 



The third and succeeding somites are regular and undivided, though some of 

 the anterior ones show above a weak transverse sulcus nearer the anterior 

 margin than the caudal. The somites are very short, those in the widest region 

 of the body being from ten to eleven times wider than long. Dorsally the somites 

 are convexly arched and moderate in height; those of the posterior two tliirds 

 of the body are crossed by a narrow, distinctly impressed, median, longitudinal 

 sulcus. The venter is flat. It is crossed over the entire length by a narrow, 

 very distinct, neural furrow. 



The pygidium is obUquely truncate above; below it narrows to an angular 

 caudal point. The principal anal cirri are long and strongly segmented, the 

 articles short, and eleven or twelve in number. 



The parapodia are moderate or short in length. They are compressed 

 in the cephalocaudal direction, the more anterior ones less so, subcylindric in 

 cross-section. In anterior or caudal view they narrow from the base distad 

 to the subtruncate or weakly rounded setigerous apex, the upper side more 

 obUque than the lower. The notocirri arise from the base of the parapodia 

 above. Each is a slender, distally strongly acuminate process which is dis- 

 tinctly segmented throughout, the articles short but always considerably longer 

 than thick. They decrease in size caudad as usual. The neurocirri of the first 

 few pairs are long and subcylindi-ical, narrowed moderately caudad and with 

 the small distal article not abruptly set off; the following somites have the 

 basal article stouter and more uniform, while the distal article is a,bruptly very 



