6o DISCOVERY REPORTS 



'Tritonia antarctica Pfeffer, 1886'. 



*Neactaeonina cingulata (Strebel, 1908) (T.). 



*N. edentula (Watson, 1883). 



*Toledonia punctata Thiele, 1912. 



*Philine gibba Strebel, 1908 (T.). 



"Cylichna" cumberlandiana Strebel, 1908 (T.). 



Cylichnina georgiana Strebel, 1908 (T.). 



*Kaitoa scaphandroides n.sp. (T.). 



Diaphana anderssoni (Strebel, 1908) (T.). 



D. antarctica (Pfeffer, 1886) (T.). 



D. inflata (Strebel, 1908) (T.). 



D. pfefferi (Strebel, 1908) (T.). 



* Kerguelenella lateralis (Gould, 1846). 



AMPHINEURA 



Terenochiton kerguelenensis (Haddon, 1886) ( = Leptochiton pagenstecheri Martens & Pfeffer 1886, T.). 



Hemiarthrum setulosum (Dall, 1878) Martens & Pfeffer, 1886; David, 1934. 



Icoplax steinenii Pfeffer, 1886 (T.). 



Tonicina zschaui (Pfeffer, 1886) David, 1934. 



CEPHALOPODA 



Graneledone charcoti Joubin, 1905; Robson, 1930. 

 G. turqueti Joubin, 1905; Robson, 1930. 

 G. polymorpha Robson, 1930 (T.). 

 Thaumeledone gunteri Robson, 1930 (T.). 



SOUTH SANDWICH ISLANDS AND REMAINDER OF SCOTIA ARC 

 Earland (1934), on the basis of the distribution of the Foraminifera, has divided this section of the 

 Antarctic into the following faunal areas: (1) Weddell Sea; (2) South Sandwich Islands; (3) South 

 Orkney Islands to Clarence Island on the Continental Shelf and Slope; (4) Scotia Sea from 29 15' to 

 6o° W; (5) Drake Strait from 6o° W; (6) Bransfield Strait and South Shetland Islands; (7) Palmer 

 Archipelago ; (8) Bellingshausen Sea. 



The whole area is within Antarctic waters, and most of it is either on the Antarctic Continental Shelf 

 or tied to it through the Scotia Arc, which links with Graham Land. 



I have added a number of species to the faunal list of the South Sandwich-Palmer Archipelago 

 section of the Scotia Arc, but even now our knowledge of the molluscs of this area is too scanty to 

 reveal any marked molluscan segregation, so for the present the area mentioned above is treated as one 



faunal unit. 



The molluscan list is made up as follows: South Sandwich Islands, 12 species; South Orkneys, 

 48 species; South Shetlands, 35 species ; Palmer Archipelago, 20 species; with a total of 93 species for 

 the four areas, obviously an incomplete list. Contrary to the foraminiferal evidence, a number of 

 molluscs are found to be common to two or more of Earland's eight areas. 



Regarding the above four localities provisionally as a whole, there are three marked influences apart 

 from an apparently endemic faunule: (1) South Georgian, (2) Kerguelen, and (3) eastern Antarctic. 



The South Georgian influence is represented by Tropidomarga biangulata, Leptocollonia thielei, 

 Pellilitorina pellita, Eationiella kerguelenensis major, Amauropsis aureolutea, Sinuber sculpta scotiana, 

 Prosipho astrolabiensis, Trophon minutus, T. shackletoni paucilamellatns and Neactaeonina cingulata, 

 although perhaps some of the above-mentioned species would be more correctly regarded as a Weddell 

 influence in the South Georgian fauna. 



