i68 DISCOVERY REPORTS 



Genus Axiothella, Verrill 



A bordered cephalic plate. Nuchal organs long, more or less parallel. Ventral 

 denticulated uncini present from the ist chaetiger. Anus conical, protuberant, sur- 

 rounded by a short funnel fringed with unequal cirri. 



Axiothella antarctica, Monro (Fig. 30). 



Monro, 1930, p. 175, fig. 72 a-c. 

 Augener, 1932 a, p. 49. 



Occurrence. St. r67 (3). 



Remarks. A few fragments come from the same station as that from which most of 



the type-material was collected. Unfortunately no complete specimen has yet been 



obtained, so that a precise specific diagnosis cannot be 



made. Among these fragments is one posterior end which 



shows five ante-anal achaetous segments and a pygidium 



(Fig. 30). The anus consists of a short cone surrounded 



by a circlet of about 15 short, more or less equal cirri, and 



, 1 • I • 1 n 11T Fig. 'JO. Axiothella antarctica. 



at the most ventral pomt there is a long tiagellirorm „^ .^,. ^ . ., 



'^ _ _ 00 Pygidium seen rrom the side. 



cirrus. Augener regards this species as close to Clymene 



minor (Arwidsson). The latter species has a very difl^erent head with short nuchal 

 organs, and the anterior border of the 4th chaetiger overlaps the 3rd chaetiger. More- 

 over, the anterior ventral acicular bristles of the first three chaetigers are different from 

 the hooks of the present species. 



Genus Maldane, Grube 

 Head in the form of a convex keel. There is a border divided into three sections by a 

 pair of deep lateral incisions. Nuchal organs short, more or less straight. Dorsal bristles 

 of three kinds. Ventral uncini, absent from the ist chaetiger, begin on the 2nd. Anus 

 dorsal. Pygidium in the form of an oval, bordered plate. The border is normally 

 incised laterally and has the ventral region smooth or crenate. 



Maldane sarsi, Malmgren, var. antarctica, Arvvidsson. 

 Arwidsson, 1911, p. 32, pi. i, figs. 23-26; pi. ii, figs. 50-54. 



Occurrence. St. 167 (i). 



Specific characters. Nineteen chaetigers and two ante-anal achaetous segments. 

 Prostomium rounded. A long and very high cephalic keel. Nuchal organs short, 

 divergent and slightly curved. Cephalic border incised laterally, otherwise entire. 



Anterior region unpigmented. A glandular crescent on the dorsal surface of the 5th 

 chaetiger. Dorsal bristles of three kinds: (i) geniculate bristles with broad wings, 

 (2) straight, bilimbate bristles with long barbed tips, (3) delicate, capillary, barbed 

 bristles. There are no ventral hooks or bristles in the ist chaetiger. The remaining 

 neuropods carry rows of hooks. 



Anus dorsal. Anal plate slightly oblique with the border laterally incised. The ventral 

 section of the border is either smooth or slightly crenate. 



