MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 135 



Cerithium pvllum, Phil. 



Cerithium pullum, Philippi, in Arch. Naturg., 1845, p. 66. 



,, cedatum, Couthouy ; Wilkes, Expl. Exped., p. 148, fig. 174 a-d. Gould, Bost. Proc., 

 iii., p. 123 (1849). 

 Bittium cedatum, Couthouy, Mission de Cap Horn, p. 40. 

 Cerithium pullum (Phil.), H. Strebel, " Beitr. der Mollusk. Fauna der Magalhaen Provinz," 



Zool. Jahrb. Jena, 1905, p. 652, Taf. xxiii., fig. 40 a-d. 



Hab. — Cape Pembroke, Falkland Islands, shore. 



Only dead and broken examples, but retaining the peculiar sculpture of this well- 

 known species. 



Cerithiopsis mcdvinarum (Strebel, MS.), sp. n. (Plate, figs. 6, 6a). 



C. testa parva, imperforata, eleganter fusiformi, brunneo-castanea, anfractibus 7-8, apud suturas multum 

 impressis, spiraliter fortiter bi-, ultimo tricarinulato, undique cancellatis et alveatis, apertura squarrosula, 

 peristomate tenui, albescente, columella recta, paullum producta. 



Long. 4, lat. L5 mm. 



Hab. — Shore, Hearnden Water, Falkland Islands. 



Dr Hermann Strebel kindly examined our only example, and returned it with the 

 above MS. name, requesting us to describe it. He informs us another example was 

 found at Port Louis, by the Swedish South Polar Expedition, eight- whorled, not quite 

 adult, in measurement 3 '9 x 1*4 x (aperture) 0*9 mm.; differentiated, but not yet 

 published. 



Family Tritonidse. 



Gyrineum vexillum (Sowerby). 



Ranella vexillum, Sowerby, jr., Conch. Must., fig. 3. 



,, ,, Deshayes, in Lam. sans Vert., ix., p. 553, No. 30. 



,, „ Reeve, Conch. Icon., iii., t. 3, fig. 13. 



Triton ranelliformis, King, Zool. Journ., v., p. 347. 



Hah. — Gough Island, trawl, 100 fathoms. 



Only in juvenile condition. By some authors the Ranella vexillum, Sowb., is 

 considered but a variety of the R. argus, Gmelin. 



(c) Gymnoglossa. 

 No representatives of this section occurred. 



(d) Rachiglossa. 



Family Muricidse. 

 Trophon brucei, Strebel. 



Trophon brucei, H. Strebel, "Beitr. der Mollusk. Fauna der Magalh. Provinz, : ' Zool. Jahrb. 

 Jena, 1904, p. 230, Taf. viii., fig. 72. 



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