9 6 DISCOVERY REPORTS 



Photinula expansa Pilsbry, 1889, p. 279, pi. 39, figs. 51, 52. 



Photinula expansa V. Ihering, 1902, p. 99. 



Photinula expansa Smith, 1902, p. 207. 



Photinula expansa Strebel, 1905, p. 152, pi. 5, figs. 9-1 1, 14, 15. 



Photinula expansa Melvill & Standen, 1907, p. 98. 



Photinula (Margarella) expansa Strebel, 1908, p. 72, pi. 5, fig. 68. 



Margarella expansa Thiele, 1912, p. 234. 



Type locality. Falkland Is. 

 St. 51. Off Eddystone Rock, East Falkland Is., 7 miles N 50 E to 7-6 miles N 63° E of Eddystone Rock, 4 May 



1926, 105-115 m. 

 St. 55. Entrance to Port Stanley, East Falkland Is., 2 cables S 24° E of Navy Point, 16 May 1926, 10-16 m. 

 St. 56. Sparrow Cove, Port William, East Falkland Is., 16 May 1926, 10J-16 m. 

 St. 58. Port Stanley, East Falkland Is., 19 May 1926, 1-2 m. 

 St. WS 85. 8 miles S 66° E of Lively I., East Falkland Is., 25 Mar. 1927, 79 m. 



Margarella violacea (King) 



Margarita violacea King & Broderip, 1830-31, p. 346. 



Margarita persica Gould, 1852, p. 192. 



Photinula abnyris Rochebrune & Mabille, 1885, p. 108. 



Photinula halmyris Rochebrune & Mabille, 1889, p. 89, pi. 4, fig. 6. 



Photinula violacea Rochebrune & Mabille, 1889 p. 87. 



Photinula violacea V. Ihering, 1902, p. 98. 



Photinula violacea Strebel, 1905, p. 145, pi. 5, fig. 1-8, 12, 13. 



Photinula violacea Smith, 1905, p. 336. 



Photinula violacea Melvill & Standen, 1907, p. 99. 



Photinula {Margarella) violacea Strebel, 1908, p. 72. 



Type locality. Strait of Magellan. 



St. 56. Sparrow Cove, Port William, East Falkland Is., 16 May 1926. ioi-16 m. 



St. 724. Fortescue Bay, Magellan Strait, 16 Nov. 1931, 0-5 m. on kelp. 



St. 1321. From 4 miles S 72 W of East Tussac Rock, Cockburn Channel, Tierra del Fuego, to 5-6 miles S 75 W 



of East Tussac Rock, 16 Mar. 1934, 66 m. 

 St. WS 71. 6 miles N 6o° E of Cape Pembroke Lt., East Falkland Is., 23 Feb. 1927, 82-80 m. 

 St. WS 80. North-west of Falkland Is., 50° 57' S, 63 37' 30" W, 14 Mar. 1927, 152-156 m. 

 St. WS 88. North of Le Maire Strait, Patagonia, 54 00' S, 64 57' 30" W, 6 April 1927, 118 m. 

 St. WS 824. Off south-east of Falkland Is., 52 29' S, 58° 27' W, 19 Jan. 1932, 146-137 m. 

 St. WS 825. Off north-east of Falkland Is., 50° 50' S, 57 15' 13" W, 19 Jan. 1932, 135-144 m. 

 St. WS 829. Between Falkland Is. and Patagonia, 50° 51' S, 63 13' 30" W, 31 Jan. 1932, 155 m. 

 St. WS 836. Off Patagonia, 53 05' 30" S, 67 38' W, 3 Feb. 1932, 64 m. 



St. WS 838. Between Falklands Is. and Patagonia, 53 11' 45" S, 65 00' W, 5 Feb. 1932, 148 m. 

 St. WS Shore collecting. Ringdove Inlet, Wide Channel, 7 May 1931. 



Range. Magellan Province: Patagonia and Tierra- del Fuego (Rochebrune & Mabille, 1885; 

 Strebel, 1905, 1908; 'Discovery'); Falkland Is. (Melvill & Standen, 1907; 'Discovery'). 



It is often difficult to distinguish between violacea and pinkish forms of expansa. Typical expansa is 

 olivaceous, with a bright green iridescence showing through on the upper whorls, and it has a relatively 

 large ovate aperture. In violacea the coloration is constantly pink, the form is more conical, the whorls 

 more tightly coiled, and in consequence the aperture is smaller and approximately circular. Both 

 species have the columellar callus deeply excavated in the middle. Examples from deep water (Sts. 

 WS 824, WS 829 and WS 838) are pure white. 



I have not seen Photinula solidula Cooper & Preston (1910, p. ill, pi. 4, fig. 3), Falkland Islands, 

 which is most likely a synonym of violacea. 



