n8 DISCOVERY REPORTS 



Amauropsis (Kerguelenatica) grisea (Martens), PL X, fig. 60 



Natica grisea Martens, 1878, p. 24. 



Natica grisea Watson, 1886, p. 432, pi. 28, fig. 5. 



Natica delicatula Smith, 1902, p. 206, pi. 24, fig. 6. 



Natica grisea Martens & Thiele, 1903, p. 64, pi. 4, figs. 2, 3, and pi. 8, fig. 44 (radula). 



Natica grisea Strebel, 1908, p. 61. 



Natica delicatula Thiele, 191 2, p. 199, pi. 12, figs. 16, 17. 



Natica grisea Smith, 1915, p. 69. 



Friginatica grisea Hedley, 1916, p. 52. 



Polinices (Lunatia) grisea L. David, 1934, p. 128. 



Type locality. Kerguelen I. 



St. 175. Bransfield Strait, South Shetlands, 63 17' 20" S, 59° 48' 15" W, 2 Mar. 1927, 200 m. 



St. 456. 1 mile east of Bouvet I., 18 Oct. 1930, 40-45 m. (two empty shells). 



St. 1660. Ross Sea, 74° 46' 45" S, 178° 23-4' E, 27 Jan. 1936, 351 m. 



St. 1952. Between Penguin I. and Lion's Rump, King George Is., South Shetlands, 11 Jan. 1937, 367-383 m. 



Range. Graham Land, 64 3' S, 56 37' W, 360 m. (Strebel); South Shetlands; South Georgia, 

 252-310 m., and between South Georgia and Falkland Islands, 2675 m. (Strebel) ; Bouvet I. ; Kerguelen 

 I., 25-95 fathoms (Watson); Cape Adare, 26 fathoms (Smith); McMurdo Sound, 190-250 fathoms 

 (Smith) ; Commonwealth Bay, 25 fathoms and off Shackleton Ice-shelf, 240 fathoms (Hedley) ; Ross 

 Sea. 



The species is easily recognized, as explained above, by the composite nature of the operculum, 

 which is horny but with an outer limy covering. It is possible that more than one species is represented 

 in the range covered, but I do not have access to sufficient material to determine this. The South 

 Georgian? shell figured by Strebel (1908) is not so depressed as Kerguelen topotypes, two of which, 

 from Royal Sound, 20 fathoms (British Museum) are figured. 



Dentition. Fig. J, 45, p. 192 (Martens & Thiele, 1903). 



Genus Polinices Montfort, 18 10 



Type (o.d.): Polinices albus Montfort = Nerita mammilla Linn., West Indies 



Polinices patagonicus (Philippi) 



Natica patagonica Philippi, 18456, p. 65. 

 Natica patagonica Hupe (Gay), 1854, p. 221. 

 Natica patagonica Tryon, 1886, p. 37, pi. 14, fig. 24. 

 Natica patagonica Rochebrune & Mabille, 1889, p. H 35. 

 Natica patagonica Strebel, 1906, p. 137, pi. 11, fig. 63. 

 Natica patagonica Strebel, 1908, p. 61. 



Type locality. North-east Strait of Magellan. 



St. 158. North-east of South Georgia, 53 48' 30" S, 35 57' 00" W, 21 Jan. 1927, 401-41 1 m. 

 St. WS 247. South of Falkland Is., 52 40' S, 6o° 05' W, 19 July 1928, 172 m. 



Range. Strait of Magellan (type) ; Punta Arenas, Tierra del Fuego and Puerto Pantalon, 7 fathoms 

 (Strebel); Lively I., Falkland Is. (Strebel); South Georgia. 



The ' Discovery ' material consists of two badly eroded shells which are probably the above species. 

 They measure respectively: height 28-5 mm., diameter 27 mm. (St. WS247); height 26 mm., 

 diameter 22 mm. (St. 158). 



