's RIJKS MUS EUM VAN NATUURLIJKE HIST ORIE — LEIDEN. 77 



phore-segments these bristles are much longer than in the cirriphore-ones 

 and arch over the dorsum. The ventral bristles are brown-coloured, simply 

 bifurcated, without accessory teeth. The head is oval, somewhat broader 

 than long, with two conspicuous eye-stalks, provided with black pigment- 

 spots. Between them a slender tentacle arises, four- to five times as long 

 as the head, provided with a clavate distal joint. The palps are not very 

 long, tapering distally. 



Aphrogenia villosa, var. laevis. 



Siboga-expedition, Stat. 285, anchorage south-coast of Timor. 



At the above named station a worm was dredged, long 8 mm., that 

 agrees in its main characters with the preceding species; however its 

 dorsal bristles have a smooth shaft and do not show any trace of 

 transversal ridges. 



Aphrogenia nigro-punctata n. sp. 



Siboga-expedition, Stat. 37, Sailus Ketjil, Paternoster-islands. 



A small worm, measuring only 7 mm. in length and consisting of 

 about 27 segments. The body is pale-grey coloured with a black spot on 

 the dorsum of the parapodia of the cirriphore-segments. There are 13 pairs 

 of elytra, much resembling in shape and appearance those of Aphrog. 

 villosa, only somewhat more elongated transversally ; besides the minute 

 papillae they show some larger, round, cellular figures, as are also present 

 in the elytra of Aphrog. alba. The dorsal bristles of the elytrophore- 

 segments are not so long as in Aphrog. villosa and do not reach the 

 median dorsal line ; they are pale-yellow, longitudinally striated and possess 

 at the tip a cluster of coarse, highly refractive tubercles, 

 that somewhat resembles the swelling below the tip of the short dorsal 

 bristles of Hermione hystrix. 



