SYSTEMATIC 81 



Range. Strait of Magellan; Tierra del Fuego (Smith, 1905); Falkland Is. (Strebel, 1907; Melvill 

 & Standen, 1914; A. G. Bennett, loc. cit.); Kerguelen I. (Thiele, 1912). 

 Length 27-00 mm.; breadth 18-0 mm.; height 7-5 mm. (St. 222). 

 Length 35-75 mm.; breadth 22-5 mm.; height n-o mm. (Falkland Islands). 

 Length 41-00 mm. ; breadth 24-0 mm. ; height 17-0 mm. (Pilsbry, 1891). 



Genus Patinigera Dall, 1905 



n.nom. for Patinella Dall, 1871 non Gray, 1848 



Type (o.d.) Patella magellanica Gmelin 



This genus and Nacella have the gill cordon continuous and the foot encircled by a scalloped 

 epipodial ridge, which is interrupted in front by the head. They both differ in these respects from 

 Cellana, which has an incomplete branchial cordon and no epipodial ridge. 



The shell in Patinigera has a subcentral apex and is of normal shape and solidity, as in Patella and 

 Cellana, but is at once distinguished by the bronzy lustre of the nacreous interior. 



The range of Patinigera covers most of the Antarctic and Subantarctic, but Nacella seems to be 

 restricted to the Subantarctic from the Magellan region to Kerguelen Island. 



The valid species and subspecies of Patinigera appear to be as follows: clypeata (Lesson, 1830), 

 Valparaiso, Chile; magellanica (Gmelin, 1791), Strait of Magellan, Tierra del Fuego and southern 

 Patagonia; magellanica venosa (Reeve, 1854) ( = chiloensis Reeve, 1855), Island of Chiloe, Chile; 

 fuegiensis (Reeve, 1855), Subantarctic, Tierra del Fuego to Kerguelen Island; aenea (Martyn, 1784) 

 { = deaurata Gmelin, 1791), Straits of Magellan, eastern Tierra del Fuego and Falkland Islands ; polaris 

 (Hombron & Jacquinot, 1841), Antarctic, South Georgia and Seymour Island to Bouvet Island ; polaris 

 concinna (Strebel, 1908), South Georgia; kerguelenensis (Smith, 1879), Kerguelen Island and Macquarie 

 Island?; macquariensis (Finlay, 1926), Macquarie Island; and terroris (Filhol, 1880), Campbell Island. 



I have not seen fuegiensis (Reeve, 1855), a seaweed-frequenting species, or delesserti (Philippi, 1849), 

 Marion Island, probably distinct, or depsta (Reeve, 1855, Island of St Paul) which may be a Cellana. 



Patinigera magellanica Gmelin 



Patella magellanica Gmelin, 1791, p. 3703. 



Patella atramentosa Reeve, 1854, fig. 41. 



Patella magellanica Reeve, 1854, fig. 19. 



Patella meridionalis Rochebrune & Mabille, 1885, p. 109. 



Patella tincta Rochebrune & Mabille, 1885, p. no. 



Patella pupillata Rochebrune & Mabille, 1885, p. 120. 



Patella metallica Rochebrune & Mabille, 1885, p. 109. 



Nacella aenea magellanica Pilsbry, 1891, p. 119, pi. 44, figs. 9-12, 15, 16. 



Type locality. Strait of Magellan. 

 Possession Bay Patagonia (Hassler Exped. 1872, ex Mus. Comp. Zool. Massachusetts). 

 Straits of Magellan, Chile (W. J. Eyerdam, 1939). 



Range. Magellan, Patagonia and Tierra del Fuego. 



This is a solid, high-conical, rounded-oval shell with strong, rather smooth radial ribs. The central 

 area is dark bronzy brown. 



Reeve's venosa ( = chiloensis), from the Island of Chiloe, is a relatively smooth, more rounded form, 

 which may be a regional subspecies. 



Length 51 mm.; breadth 40 mm.; height 28 mm. (Straits of Magellan). 



Length 51 mm.; breadth 38-5 mm.; height 25 mm. (Possession Bay). 



Length 46 mm. ; breadth 43 mm. ; height 25 mm. (Straits of Magellan). 



5-2 



