480 PROCEEDINGS OF THE ACADEMX OF [June, 



Capillary setae of 2 kinds, both few in number, in the dorsal bundles; 

 those found on all setigerous somites are relatively large, fibrillated, 

 tapering, the tips acute and sometimes curved, with a short distinct 

 flange on one side. Fringed capillary setse are found in the middle so- 

 mites ; colorless, very slender, with elongated tips, with rather widely 

 separated, short hairs closely appressed to, and usually arranged in 

 pairs on both sides of the shaft of the seta. Farther back these are 

 replaced by setae which are doubly winged at the base of the exposed 

 portion, bcA^ond which are extremely long faintly fringed capillary tips. 



Crochets yellow, with curved tapering fibrous stems, which are not 

 shouldered and only slightly enlarged at the surface of the body; 

 exposed portion long and slender, the head not much enlarged, but 

 provided w^th a very long, sharp beak, the tip of which is slightly re- 

 cvirved; accessory teeth 4 to 6, the first large and typically standing 

 sharply apart from the beak, the others also slender and distinct, except 

 the 1 or 2 smallest, which are more obscure and fibrous ; guard greatly 

 developed, in 2 lateral halves, each formed of about 23 strong hairs 

 joined together above the teeth by a membrane-like band beyond which 

 the hairs are much finer and may constitute a delicate fibrillated web, 

 arching over the basal half (not the tip) of the principal hook and meet- 

 ing the opposite half of the guard above ; no distinct subrostral process. 

 On somite V the crochets are only bent, not hooked, with one large 

 and one smaller blunt vitreous process, and a group of small fibrous 

 ones; guard, if perfect in the example studied, consisting of a few 

 gently curved subrostral hairs reaching only as far as the point of the 

 principal spine. 



Acicula bright ^^ellow, one each on ventral side of tori of II, III and 

 IV, stout, tapering to a blunt point, and fibrous. 



Tubes fragile, of coarse, dark-colored sand grains and bits of shell. 



Suruga Bay, 3,713, 65 fms.; 3,725, 13 fms., type. 

 Clymene mirabilonga sp. nov. (PL XXVII, figs. 89-93.) 



Head uniannulate, the prostomium and peristomium completely 

 united, short, somewhat compressed, vertical diameter equal to great- 

 est length on ventral side; mouth ventral, large, bounded posteriorly 

 and laterally by a rugous crescentric fold, anteriorly by the wrinkled 

 base of the rather narrowly triangular, pointed, prostomial lobe or 

 palpode; cephalic plate very broad, nearly orbicular when the limbate 

 margin is spread, broadly oval when viewed from above with margin 

 in normal position, the margin divided by a pair of clefts into anterior 

 and posterior lobes, of which the latter is f as long as the former; pos- 

 terior lobe suberect, faintly divided by median and lateral emargina- 



