268 Southern Cross. 



Gattyana. 



Mclntorfi, W. C. 'British Annelids,' Part 11., ' Polychaeta. Amphinomidae to 



Sigalionidae.' Bay Sue. 3£oiiryrupJi, 1900, p. 285. 

 Syn. Nychia, Malmgren, pre-occnpied. 



Setae superiores debiles, plerumque tenuiores quam setae ventrales ; setae ventrales 

 apice int€gro ; elytra scabriuscula, dorsum tegeutia ; paljsi papillis minutis 

 clavatis truncatis obsiti. 



3. GaTTYANA CRISTATA. 

 (PI. XLIV., figs. 1-i.) 



Pars media dorsalis segmentorum omnium crista transversa praedita ; setae 

 superiores tenerae asperae interdum apice penicillato; elytra pertinibriata, 

 tuberculis crenatis munita. 



Three specimens of this interesting species, the first representa- 

 tive of the genus to be recorded from Antarctic waters, were dredged 

 off Franklin Island in 10 to 20 fathoms. 



Length of largest specimen 24 mm. ; width from below, including 

 parapodia, but not including setae, 8 mm. ; number of segments, 

 thirty-five. 



Characteristic for the species are (1) the cristate dorsum of each 

 segment ; the first crest on the first elytra- bearing segment is rotund, 

 the rest becoming more drawn out transversely until the maximum 

 is reached. 



(2) The crenate tubercles of the sub-orbicular elytra. These 

 tubercles are of large size and comparatively few in number in 

 the posterior half of the elytron, graduating in size from the more 

 numerous smaller verrucae of the anterior half. The elytra also 

 carry numerous long filiform fimbriae, both marginal (external and 

 posterior) and extra-marginal. 



(3) The tufted tips of the larger dorsal setae. The tip of the 

 setae is produced into a slender flagellum surrounded by a tuft of 

 fine long setulae; often the flagellum is absent, either lost or 

 undeveloped, and then the setae terminate in a brush. These setae 

 resemble the penicillate setae of Panilialis oerstedi} 



The most dorsally placed setae are feeble and flexible. 



Malmgkenia. 



Mcintosh, 1876, char, emend. 



Mcintosh, W. C, 1876. Tr. Zool. Soc, London, IX., p. 376. Id., 1900, Kay Soc. 



Mon., p. 379. 

 Prostomium lyriforme ; processus omnes corporis (viz., palpi, tentaculum, antennae, 



cirri, elytra) glabri vel subglabri ; setae ventrales distincte vel obsolete 



bidentatae. 



' Cf. Mcintosh, op. cit., 1900, p. 403, and PI. XL!., fig. 51. 



