INTRODUCTION 61 



The Kerguelen influence is shown by Pellilitorina setosa, Amanropsis (Kerguelenatka) grisea, Marseni- 

 opsis pacifica, Paradmete fragillima and Neactaeonina edentula. 



Finally, the eastern Antarctic (Enderby and Victoria Quadrants) influence is provided by Falsi- 

 margarita gemma, Antimargarita dulcis, Subonoba frandidenta, Balds solitaria, Neobuccinam eatoni, 

 Prosipho madigani, Acteon antarcticus, Philine alata and Toledonia major. 



Many of these correlatives are of deep-water occurrence, and in consequence are not restricted by 

 the deep-water breaks in the Scotia Arc. The occurrence of the Magellanic genus Tromina may be 

 accounted for in this manner. 



It will serve no useful purpose to name the apparently endemic species for this group of islands, since 

 further collecting will probably show many of them to be of wider range than our present knowledge 

 indicates. The ultimately acceptable endemic species will be found amongst those indicated in the 

 respective locality columns by ' T. ', which signifies type locality. Localization in Chlanidota at least is 

 shown by the occurrence of three species not recorded from elsewhere. 



In this list an asterisk, as before, indicates that the species occurs in the Discovery collections, ' L. ' 

 refers to Lamy's 1906 paper, 'M. & S.' to Melvill & Standen's 1907 and 1912 papers, 'M.' to Massy 

 (1920), 'R.' to Robson (1930), and 'Th.' to Thiele (1912). 



South Sandwich Islands, South Orkneys, South Shetland Islands and 

 Palmer Archipelago Check List 



PELECYPODA s Sand> s 0rk s Shet Palm 



Nucula minuscula Pfeffer, 1886 — M. & S. — 



Yoldia eightsi (Couthouy, 1839) M. & S. 



Y. inaequisculpta Lamy, 1906 — T. — — 



Y. woodwardi Hanley, i860 L. 



Lissarca bennetti Preston, 191 6 — T. 



L. miliaris (Philippi, 1845) Th. — 



L. notorcadensis Melvill & Standen, 1907 — T. — 



L. rubrofusca Smith, 1879 M. & S. — 



Limatida deceptionensis Preston, 1916 — — T. — 



L. pygmaea (Philippi, 1845) M. & S. — 



Hochstetteria meridionalis (Smith, 1885) M. & S. 



H. quadrata (Pfeffer, 1886) — M. & S. — — 



H. wandelensis (Lamy, 1906) M. & S. — 



Palliolum pteriola Melvill & Standen, 1907 T. 



Thyasira falklandica (Smith, 1885) M. & S. 



Lasaea consanguinea (Smith, 1879) M. & S. 



Mysella flavida (Preston, 1916) T. 



'Kellia' lamyi Melvill & Standen, 1907 M. & S. 



Cyamiomactra laminifera (Lamy, 1906) T. 



Laternula elliptica (King & Broderip, 1832) Th. Th. 



GASTROPODA 



* Schizotrochus englyptus (Pelseneer, 1903) 



Scissurella timora Melvill & Standen, 1912 T. 



*Puncturella conica (d'Orbigny, 1841) — 



*Pati?ugera polaris (Hombron & Jacquinot, 1841) * 



*Falsimargarita gemma (Smith, 1915) 



# 

 # 

 # 



* Antimargarita dulcis (Smith, 1907) 



*Tropidomarga biangulata Powell n.sp. 



*Margaretla antarctica (Lamy, 1905) T.* 



