Mullusca from the JSorth-iosst Falkhinds. 115 



Var. viexicana, Sowb. 



Fissurella mexicana, Sowb. Couch. lUustr. fig. Gl ; Thes. Conch, p. 180, 

 figs. 26-28. 



Roy Cove, not adult ; King George's Bay. 



Exam[)les in good condition were collected miles inland, 

 in camp, evidently dropped by sea-birds after they iiad 

 devoured the inhabitant. We follow Dr. Hermann Strebel 

 in considering mexicana a form of oriens. The typical form 

 does not appear. 



Fissurella pi'cta (Gmel.). 



Patella picta, Gmelin, p. 3729. sp. 198. 



JFissurella picta, Sowerbj, Couch. lUiistr. figs. 4, 26. 



On the beach, Roy Cove, at low water, Shallow Bay. 



Fissurella polygona, Sowb. 



Fissurella poh/fiona, Sowerby, Thes. Conch, vol. iii. p. 186, fig. 137 ; 

 Pilsbry, 31an. Couch, xiii. p. 143, tab. Ix. fig. 84 ; H. Strebel, 

 Mollusk. der Magalhaen-Proviuz, p. 85, Taf. i. figs. 4, 5, 6 (1907). 



Roy Cove, low water to 2-4 fathoms; also Rapid Point 

 (March 31st, H)ll). 



Dr. H. Strebel deems this either synonymous with or a 

 variety of the next (F. radlosa. Less.). 



Fissurella radiosa, Lesson. 



Patella radiosa, Lesson, Voy. de la 'Co^uille,' vol. ii. p. 411 (1826); 

 Pilsbrv, in Trvon, Man. Couch, xiii. p. lo7 ; Melvill & Stauden, 

 Jouru' of Conch, ix. p. 102 (1898). 



Lively Island, East Falklands. 



This was also obtained some years ago .from the same 

 locality by Miss Cobb in finer conditioa and variety ; and 

 likewise by Mr. R. Vallentin from Port Stanley. 



P uncturella noacldna (L.), Lowe. 



Patella noachina, Linn, Mant. Plant, p. 551. 



Puncturella noachina, Lowe, Zool. Jouru. iii. p. 78 (1827) ; Forbes & 



Hauley, ii. p. 474, pi. Ixii. figs. 10-12 ; Pilsbry, in Tryon, Man. 



Conch, xii. p. 229. 



Var. falklandiana, A. Adams. 



Puncturella falklandiana. Ad., Tryou, I. c. p. 231, tab. Ixiii. fig. 33. 

 Puncturella noachina, \?iT. falklandiana, H. Strebel, Mollusk. der Magal- 

 haen-Provinz, \\ 104 (1907). 



Roy (love, on rocks at low water. 



