j8o discovery reports 



Polymnia nebulosa (Montagu). 

 Fauvel, 1927, p. 257, fig. 89 a-g. 



Occurrence. St. WS 840 (5). 



Specific characters. A very conspicuous dark band of eye-spots across the cephalic 

 lobe. Lateral lobes on the second, third and fourth segments. Seventeen thoracic 

 chaetigers. Bristles narrowly bordered and smooth. Hooks in double rows from the 

 seventh to the sixteenth unciniger. Above the main fang there is a pair of large parallel 

 teeth surmounted by a crest of one to five denticles . 



Remarks. I have compared these specimens with some European examples of this 

 species and I can find no grounds for separation. P. nebulosa has an almost cosmopolitan 

 distribution, but to the best of my knowledge this is the first record of it as far south as 

 the Falkland Islands. 



Genus Neoleprea, Hessle 



Two pairs of ramified gills. No lateral lobes in the anterior region. The notopods 

 begin on the third segment and the neuropods on the fifth. The bristles have strongly 

 denticulated tips. The hooks are in double rows over a certain number of segments. 



Neoleprea streptochaeta (Ehlers). 



Leprea streptochaeta, Ehlers, 1897, p. 130, pi. viii, figs. 203-205. 

 Neoleprea streptochaeta, Hessle, 1917, p. 192. 

 Occurrence. St. WS 583 (i). 



Specific characters. Two pairs of richly branched gills. No eye-spots. 17-18 pairs 

 of thoracic notopods. About 13 gland-shields. The dorsal bristles are characteristic. 

 They are geniculate with twisted and denticulated tips. The hooks are in single rows on 

 the first eight tori, behind which they are in double rows in all except the last few seg- 

 ments. There are two or three rows of teeth above the main fang of the hooks. 



Genus Loimia, Malmgren 

 Three pairs of ramified gills. There are lateral lobes in the anterior region. The noto- 

 pods begin on the fourth segment and the neuropods on the fifth. The bristles are 

 smooth and the hooks are pectiniform and set back to back. 



Loimia medusa, Savigny? juv. 



Loimia montagui (Grube), Monro, 1930, p. 186. 

 Loimia medusa} Monro, 1931, p. 212, fig. i. 



Occurrence. St. 413 (15); 446 (20); 448 (3). 



Specific characters. These small, postlarval, pelagic terebellids are exactly similar 

 to the specimen described by me {loc. cit., 193 1) from St. 102 in the middle of the South 

 Atlantic. They measure about 15 mm. in length and the third pair of gills is just be- 

 ginning to appear. There are five or six teeth to the thoracic hooks. I have already 

 expressed the opinion that these specimens are identical with Agassiz's larva which 

 Fauvel in 1907 suggested might be that of L. medusa. 



