DENTITION 



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Fig. I. Dentition of Littorinidae, Cerithiidae and Struthiolariidae. (26) Laevilitorina caliginosa (Gould), South Georgia 

 St. MS 70. (27) Laevilitorina (Corneolitorina) coriacea Melvill & Standen, South Orkneys, St. 166. (28) Laevilacunana 

 antarctica (Martens), South Georgia (Martens & Pfeffer, 1886, pi. 3- %• ^)- (2°) Laevilacunaria n.g. bransfieldensis 

 (Preston), South Shetland Is., St. i486. (30) Laevilacunaria (Pellilacunella) bennetti (Preston), Palmer Archipelago, 

 St. 179. (31) Macquariella aucklandica Powell, New Zealand. (32) Pellilitorina setosa (Smith), South Georgia, St. MS. 71. 

 (33) Pellilitorina pellita (Martens), South Orkney Is., St. 164. (34) Ataxocerithium pullum (Philippi), Falkland Is., St. WS 225. 

 (35) Perissodonta georgiana Strebel, South Georgia, St. WS 62. (36) Struthiolaria papulosa (Martyn), New Zealand. 

 (37) Pelicaria vermis (Martyn), New Zealand. 



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