MoUusca from the JS'orth-ioest Falklands. 135 



calcareo-alba, parum niteiite, cardine valvae sinistrae dente 

 spathulato magno, dextrse fossa congruente prsedito, ligamento 

 interno. 

 Alt. 11, lat. 16 mm. 



Ilab. ''N.W. Falklands." 



We can find no M/ja, till now, recorded from the Southern 

 Hemisphere. This new form much resembles, at first sight, 

 a miniature AI. truncata, L., but, as first pointed out to us by 

 Mr. Edgar Smith, the concentric lines and sculpture anteriorly 

 are closer and altogether different in character. 



In 1898 we published the description, under the name 

 Thracia ayitarotica, of a shell from Lively Island, E. Falk- 

 lands, collected by Miss Cobb *. We think it possible this 

 may be the same species. It was rather larger, ruder in build, 

 and distorted, so that we considered it, at the time, most allied 

 to Thracia distorta, Phil. The discovery of a good series 

 of specimens is much to be desired, both of this and the Mya, 

 when the question may be cleared up. 



Saxicava arctica (L.) . 



Mya arctica, Linne, Syst. Nat. p. 1113. 



Saxicava arctica (L.), Forbes & Hanley, i. p. 141, pi. vi. figs. 4^6. 



Var. antarct'ica^ Phil. 



Saxicava antarctica, Philippi, Archiv fiir Naturg. (1845) ; Trans. 

 Royal Soc. Edinb. xlvi. p. 151 (1907). 



Port Egremont, on the beach after a gale, also at the roots 

 of Macrocystis and other fucoid algse. 



Fam. Solenidae. 



Solen macha, Mol. 



Solen macha, Molina, Hist. Nat. du Cliiie, p. 178 (1787) ; Gmelin, 



Syst. Nat. p. 3220; D'Urbiguy, Amer. Merid. p. 505; Gay, Hist, de 



Chile, Zool. Yol. viii. p. 369, pi. viii. tig. 6. 

 Solen gladiolus, Gray, in Beechey's Voyage ' Blossom,' p. 163, pi. xlni. 



tig. 4. 

 Solen macha, Reeve, Conch, Icon., Solen, fig. 28 ; "■ Oken," Martini & 



Chemnitz, Conch. Cab. Taf. viii. p. 26, fig. 5 (1888). 



Sandy beach on Pebble Island, after severe shore-gales. 



" This beach faces due north, and appears to be the only 

 locality for this species in the Falklands. It was impossible 

 to hunt for them, and so procure live examples, owing to 

 the heavy surf." — R. V. 



A very fine and large species. 



♦ Journ. of Conch, ix. p. 105^ pi. i. figs. 13, 13 a (1898). 



