82 AUSTRALASIAN ANTARCTIC EXPEDITION. 



Family TEREBELLID^E. 



Suh -Family Amphitritin.^ . 



Genus Amphitrite 0. F. Miiller, 



Amphitrite kerouelensis MelntosJi. 



Mcintosh (1876), p. 321. 



Grube (1877), p. 546. 



Mcintosh (1885), p. 443, pi. XLVIH, fig. 7; pi. XLIX, fig. 1. 



Ehlers(1897), p. 130; (1901) p. 208; (1908) p. 145: (1913) p. 556. 



Gravie.r (1911), p. 129, ph XII, fig. 166 (tube). 



Five specimens of tliis large species were oljtained at a depth of 157 fathoms, 

 but none are complete. The largest measures 140 mm. for 75 segnients, with a diameter 

 of 10 mm. at about the 8tli segment. The tube is thick- walled, and consists apparently 

 of fine grey mud ; of which a portion measures 40 mm. long, and has a thickness of 5 mm. 

 The mud contains very varied forms of diatoms, both long-shelled and circular; 

 fragments of sponge spicules and a few radiolarian tests. It agrees with Gravier's 

 figure, which he attributes " probably " to this species. 



Locality. — ■ 



Commonwealth Bay, Station 3, 157 fathoms. 



Distribution. —Kevgnelen (Mcintosh, Grube), Petermann, andS. Shetlands (Gravier), 

 Fuegia and Bouvet Island (Ehlers). 



Genus Terebella (Linnwus) Malmgren. 



Terebella ehlersi Gravier. 



Gravier (1906), p. 47, pi. V, figs. 45, 46. 

 Gravier (1911), p. 130. 

 Ehlers (1913), p. 556. 



In the previous expeditions only one or two individuals of this Antarctic species 

 seem to have been obtained, but during the visit of the " Aurora " to Commonwealth 

 Bay, as many as fifty specin^ens were procured. It is then evidently fairly abvmdant 

 in that area, though not nearly so common as some other species of Terebellids. In 

 some instances the label includes a note as to colour, which is " bright red." The 

 worm lives in depths of from 2-6 fathoms, though it seems to be commoner at about 

 25 fathoms, and less common at greater depths. 



There is a slight discrepancy in the account given by the two authors as to the 

 nature of the tube. I find that the membranous basis is covered with material which 

 varies with the nature of the bottom ; in some it consists of rather fine sand grains, 

 interspersed with fragments of brown algae, as described by Gravier. Other tubes 



