ERRANTIATE POLYCHAETA OF JAPAN. 73 



curved and tapering (woodcut C), bears opposite pairs of slender 

 awn- like spines, and have slightly enlarged bases ; these are arrang- 

 ed in a single vertical row which extends nearly half-way down 

 the anterior face of tlie parapodium. Behind these is a second 

 vertical row, of stouter colourless bristles (woodcut B.), slightly 

 enlarged subterminally and tlien tapering and fringed. A third 

 vertical row contains bristles of two kinds. Five or six pale 

 yellow, short, stout l^ristles occupy the dorsal end of the bundle 

 in more anterior, and the middle in more posterior segments ; 

 they present a subterminal enlargement, and a peculiarly rough- 

 ened slightly hooked tip continued into a hairy filiform appendage 

 and guarded liy a dense brusli of very stiff hairs (woodcut A.). 

 Ventral to these in anterior, and both ventral and dorsal in 

 posterior, segments is a group of colourless more slender bristles, 

 with broad lace-shaped ends and transverse row of fine hairs. 

 Habitat : — Suruga Bay, 03-75 fathoms ("Albatross"'). 



Family Aphroditidae. 



Body short, oval and depressed ; the particularly strong dorsal 

 setae are directed upwards and backwards so as to protect the 

 elytra. Ventral setae are also str(^ng. They are all unjointed. 

 l^rostomimn with, usually 2 pairs of eyes, a single median ten- 

 tacle, under which is a papillose facial tubercle. No lateral ten- 

 tacles ; subtentacles 2. Peristoiuium setigerous, with long ten- 

 taculai' oin-i. The jaws are represented merely by thickened 

 })i'ntninences. 



Key to the genera found in Japan. 



a'. Eyes sessile ; ilDisiiin covered with thick felt ; ventral bristles 

 simple . . Jplirodita. 



