. Fig. G. Dentition of Fissurellidae, Trochidae and Turbinidae. (1) Puncture/la noachina Linn., Greenland (Troschel & Thiele, 1891, pi. 27, fig. 2). (2) Puncturella conica (d'Orbigny), South Georgia, St. 27. (3) Parmaphorella melvilli (Thiele), Falkland Is., St WS 825. (4) Margarella (Promargarita) tropidophoroides (Strebel), South Georgia (Thiele, 1912, pi. 15, fig. 17). (5) Antimargarita dulcis (Smith), McMurdo Sound (Eales, 1923, fig. 4). (6) Tropidomarga biangulata and , South Georgia, St. 159. (7) "Margarita striata' =Pupillaria cinerea Couthouy, Greenland (Troschel &am


. Fig. G. Dentition of Fissurellidae, Trochidae and Turbinidae. (1) Puncture/la noachina Linn., Greenland (Troschel & Thiele, 1891, pi. 27, fig. 2). (2) Puncturella conica (d'Orbigny), South Georgia, St. 27. (3) Parmaphorella melvilli (Thiele), Falkland Is., St WS 825. (4) Margarella (Promargarita) tropidophoroides (Strebel), South Georgia (Thiele, 1912, pi. 15, fig. 17). (5) Antimargarita dulcis (Smith), McMurdo Sound (Eales, 1923, fig. 4). (6) Tropidomarga biangulata and , South Georgia, St. 159. (7) "Margarita striata' =Pupillaria cinerea Couthouy, Greenland (Troschel & Thiele, 1891, pi. 25, fig. 9). (8) Margarella bouvetia , Bouvet I. (9) Margarella antarctica (Lamy), South Orkneys, St. 164. (10) Submargarita impervia Strebel, South Georgia (Thiele, 1912, pi. 15, fig. 18). (11) Solariella kempi , Falkland Is., St. WS 766. (12) Solariella biradiatula Martens, Dar-es-Salam (Martens & Thiele, 1903, pi. 8, fig. 37). (13) Leptocollonia thielei and , South Georgia, St. 156. (14) Homalopoma carpenteri Pilsbry, California (Pilsbry, 1888, pi. 60, fig. 73).


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