REPORT ON THE L4lMELLIBRANC1I1ATA. 173 



Chama spinosa, Broderip. 



Chaina qiino-<a, Broderip, Trans. Zool. Soc. Loud., vol. i. \t. 306, pi. xxxviii. figs. 8, 9. 

 Chama spinosa, Ileove, Concli. Icon., vol. iv. fig. 44a. 

 Chama spinosa, Angas, Proc. Zool. Soc. Loud., 18G7, p. 925. 



Habitat. — Port Jackson, Sydney. 



A single small specimen only attached to a portion of a Mytihis. Angas observes 

 that the species is "found attached to rocks at low spring tides." The type shells are 

 said to have come from Lord Hood's Island in the Pacific Ocean. 



Family L u c i N i D yE. 



Lucina, Bruguiere. 

 Lucina columhcUa, Lamarck. 



Lucina columbdla, Lamarck, Anim. sans vert., ed. 2, vol. vi. p. 230. 

 Lucina coliimheUa, Hanley, Cat. Piec. Shells, p. 77, pi. ix. fig. 2. 

 Lucina columhella. Reeve, Concli. Icon., vol. vi. pi. vi. fig. 30. 

 Lucina columhella, Sowerbj^ Gen. Shells, lig. 6. 



Lucina adansoni, d'Orbigny, in Webb and Berthelot's Hist. Ivat. Canaries, vol. ii. part 3, 

 p. 107, pi. vii. figs. 26-28. 



Habitat. — St. Vincent, Cajae Verde Islands, in 7 to 20 fathoms. 



This species is also found at the Canary Islands and perhaps as far south as Senegal. 

 The Challenger specimen is remarkably globular, being 37 mm. in length and height and 

 34 in diameter. 



Lucina lamellata, Smith (PL XIII. figs. 1— 1&). 



Diplodonta lamellata. Smith, Proc. Zool. Soc. Lond., 1881, p. 38, pi. v. figs. 1-lc. . 



Testa solida, ii-regulariter rotuudata, insequilateralis, autice brevior, angustata, postice 

 oblic[ue truncata, ad extremitatem rotunde subangulata. Valvse mediocriter convexse, 

 albidae, epidermide sordide flavescente rugose striata iudutse, lameUis concentricis 

 conspicuis oruataj, prope marginem dorsi ^josticum depressse, antice lunula lanceolata 

 profunde excavata instructse. Margo dorsi posticus leviter arcuatus, parum decliAns, 

 elongatus, antieus brevior, valde obliquus, concavus. Ventris margo rotundatus, anterius 

 oblique longe ascendens. Ligamentum crassum, hand prominens, in sulco elongato 

 profundo situm. Dentes cardinis duo in utraque valva mediocriter vahdi, divergentes, 

 iusequales, lateralis unicus antieus subtuberculiformis. Pagina interna alba, cretacea, 

 ahquauto rugosa. Cicatrix antica prelongata, angusta, fere usque ad medium testae 

 extensa, subnitida, striata, postica irregulariter ovalis, latior. 



