84 



DISCOVERY REPORTS 



Specific characters. Dorsal felting absent. May attain a size of 1 8 cm. by 3 J cm. 

 with about 50 chaetigers. 18-20 pairs of elytra. Harpoon-shaped bristles with five to 

 six teeth. Slender bipinnate ventral bristles confined to the first four chaetigers. There 

 may be as many as 50 stiff hairs below the tip of the bifurcated ventral bristles. 



L.filicornis is a much smaller species with only 15 pairs of elytra. Both Mcintosh 

 and Fauvel state that the slender ventral bipinnate bristles of the anterior region extend 

 to the first five chaetigers. Working, it is true, with rather poor material I have myself 

 failed to find any behind the 4th chaetiger. 



Family POLYNOIDAE 



1. With no lateral tentacles... ... ... ... ... ... ... ... Macellicephala 



— With lateral tentacles 2 



2. 1 2 pairs of elytra .. . ... ... ... ... ... ... ... ... Euphionella 



— 15 pairs of elytra ... ... ... ... ... ... ... ... ... ... ... 3 



— 18 pairs of elytra ... ... ... ... ... ... ... ... ... ... ... 8 



— Elytra numerous. Body long, vermiform ... ... ... ... ... ... ... 9 



3. Body short, about 40 segments, more or less completely covered by elytra ... ... 4 



— Body short, between 40 and 50 segments, not covered by elytra in hinder region 



... Hermadion 



— Body long and vermiform, elytra confined to anterior region ... ... ... Polynoe 



4. Lateral tentacles inserted subterminally. A facial tubercle present .. . ... ... Eulagisca 



— Lateral tentacles inserted ventrally. No facial tubercle ... ... ... ... ... 5 



5. Upper ventral bristles slender, capillary ... ... ... ... ... ... ... 6 



— Upper ventral bristles moderately stout ... ... ... ... ... ... ... 7 



6. Upper ventral bristles capillary with a long spinous region and a hair-like tip ... Antino'e 



— Upper ventral bristles ending in a minutely bifid tip... ... ... ... ... Eucranta 



7. Ventral ramus having either bidentate bristles only, or both bidentate and unidentate 

 bristles Harmotho'e 



— Ventral ramus having unidentate bristles only ... ... ... ... ... Eunoe 



8. Lateral tentacles inserted subterminally. Dorsal bristles slender and heavily pectinated 



... Halosydna 



9. With both a facial tubercle and an occipital flap ... ... ... ... ... Hololepida 



■ — With neither facial tubercle nor occipital flap .. . ... ... ... ... ... ... 10 



10. Lateral tentacles inserted terminally ... ... ... ... ... ... Lepidatnetria 



— Lateral tentacles inserted ventrally ... ... ... ... ... ... ... Polyeunoa 



Genus Harmothoe, Kinberg 

 Lateral tentacles inserted ventrally. Prostomium with lateral peaks. Fifteen pairs of 

 elytra more or less covering the whole back. Dorsal chaetae stouter than the ventral 

 which are usually bidentate, but may be both bidentate and unidentate. 



Subgenus Barriikia. Harmothoe (Barrukia) cristata 



3- 



Dorsal bristles with bearded tips 



Dorsal bristles without bearded tips 



Dorsal bristles of two distinct types 



Dorsal bristles of one type 



Ventral bristles usually all bidentate 



Ventral bristles partly bidentate and partly unidentate 



4. Elytral tubercles few, confined to a small area near scar of attachment 



Harmothoe benthophila 



3 



4 



7 



Harmotho'e magellanica 



