g 4 DISCOVERY REPORTS 



The concinna form is represented in the collections only from South Georgia. Benthic shells from 

 the South Orkneys and South Shetlands have the shape and sculpture of typical polaris. 



Form A (typical) : 



Length 27-25 mm.; breadth 19-0 mm.; height 8-o mm. (St. MS 12). 

 Length 2875 mm.; breadth 20-0 mm.; height 8-5 mm. (St. MS 66). 

 Length 2070 mm.; breadth 14-0 mm.; height 4-5 mm. (Strebel, 1908). 

 Length 32-00 mm.; breadth 21-5 mm.; height 77 mm. (Strebel, 1908). 



Form B: 



Length 35-75 mm.; breadth 24-6 mm.; height 8-5 mm.' 



Length 36-00 mm. ; breadth 24-5 mm. ; height 7-0 mm. ,g t ^g x 



Length 39-50 mm.; breadth 27-5 mm.; height 9-5 mm. 



Length 42-00 mm. ; breadth 29-0 mm. ; height 9-0 mmJ 



A near relative to polaris is the Kerguelen Island Patella (Patinella) kerguelenensis Smith (1879, p. 177, 

 pi. 9, figs. 13, 13a). This has a large thin elevated shell with subobsolete radial sculpture, very like 

 polaris except for a constant narrowing of the anterior end which results in a true oval outline. Hedley 

 (1916, p. 44) recorded this species from Macquarie Island, but I have not seen the material. 



Family LEPETIDAE 

 Genus Lepeta Gray, 1840 

 Type (monotypy) : Patella caeca Mueller, Boreal Seas 

 Lepeta coppingeri (Smith) 



Tectura {Pilidium) coppingeri Smith, 1881, p. 35, pi. 4, figs. 12, 12a. 



Tectura coppingeri Rochebrune & Mabille, 1889, p. H.90. 



Lepeta coppingeri Pilsbry, 1891, p. 71, pi. 39, figs. 20, 21. 



Lepeta {Pilidium) antarctica Smith, 1907, p. 12, pi. 2, figs. 11, 11 a. 



Pilidium coppingeri Strebel, 1907, p. no, pi. 3, fig. 38. 



Pilidium coppingeri Strebel, 1908, p. 83. 



Lepeta antarctica Hedley, 191 1, p. 4. 



Lepeta coppingeri Smith, 1915, p. 62. 



Lepeta coppingeri Hedley, 1916, p. 41. 



Lepeta coppingeri Eales, 1923, p. 6. 



Type localities. Sandy Point, 9-10 fathoms, Patagonia {coppingeri) ; McMurdo Sound, 130 fathoms 

 {antarctica). 



St. 1652. Ross Sea, 75 56-2' S, 178 35-5' W, 23 Jan. 1936, 567 m. (one example). 



St. WS 246. Off south end of West Falkland Is., 52° 25' S, 6i° W, 19 July 1928, 267-208 m. (one empty shell). 



Family FISSURELLIDAE 

 Genus Fissurella Lamarck, 1799 

 Type (monotypy): Patella nimbosa Linne, 1758 

 Subgenus Balboaina Farfante, 1943 

 Type (monotypy): Patella picta Gmelin, 1791 

 The subgenus Balboaina was proposed for large species (up to 100 mm. in length) with the shell 

 margin entirely in one plane, not crenulated and with a broad dark internal border. Orifice a little in 

 front of the middle and surrounded internally by a broad callus. Distribution: Chile and Magellan 

 Province. 



