18 AUSTRALASIAN ANTARCTIC EXPEDITION. 



appear to be confined to the Antarctic region, namely, Terebella ehlersi, T. vayssieri, 

 and Ij&ma arenilega. The others enter the sub-antarctic region at Kerguelen and 

 Tierra del Fuego, &c., while the seventh Scione mirabUis (which, as I show, includes 

 S. spinifera Ehlers) travels up both coasts of South America into the southern tem- 

 perate zone. 



Family AMPHARETID^. 



Six species of this family have been gathered by previous expeditions within 

 this area ; the present report contains an account of only two species, both of them 

 new, as I have mentioned earlier in the memoir. These are Phyllocomus dibranchiata 

 and Amythas (gen. nov.) membranifera. 



Family CAPITELLIM. 



It has been stated that this family does not enter the Antarctic region, but 

 Gravier has recorded one species, Isamastus pemrmatus from the Weddell Quadrant, 

 and this has also been obtained by the " Aurora." 



Family MALDANID^E. 



The Swedish expedition has added materially to our knowledge of the family, 

 as it exists in this region so that seven well characterised species and some varieties are 

 known, as well as three unspecified forms recorded by Ehlers. The " Aurora" 

 gathered two of the species, both of which are confined to this region, namely, Rlwdine 

 intermedia (hitherto confused with the northern R. loveni) and Isocirrus yungi, originally 

 discovered at Petermann Island. 



Family CHLORHvEMIMi. 



Of the six species of Flabelligera reported from the Antarctic only one is included 

 in this collection (F. mundata), which is wide-spread round the southern land-mass. 

 The only other member of the family that has been mentioned is Trophonia kerguelarum 

 Grube, as having been obtained by the " Discovery" at winter quarters, but no 

 reference to this locality is made in Ehlers in his later works, though it is sub-antarctic 

 in its distribution. 



Family SABELLID^E. 



Nine species have been recorded from this region, of which tour are quite small 

 and have been obtained only by the " Gauss." The only species collected by the 

 " Aurora" is Potamilla antarctica, which occurs in considerable numbers, and some- 

 times attains a large size. It also enters the Sub-antarctic region. 



Family SERPULID^E. 



Two of the ten species known to occur in the Antarctic are contained in this 

 collection the widely distributed Serpula vermicularis and Spirorbis nordenskjddi. 



