SMITH : ON AUSTRALIAN MACTKID^. 149 



from the resilium. The lateral teeth are thin and short, and 

 conspicuously near the cardinals. 



34. Mactea rufescens, Lamarck. B.M. 



Mactra rufescens, Lamarck, Anim. sans Vert., "vol. v, p. 476, 1818; 



lieeve, pi. iii, fig. 9 ; WeinkaufF, p. 88, pi. xxx, figs. 4. 5 ; 



Pritchard & Gatliff, Proc. Roy. Soc. Victoria, vol. xvi, p. 106, 



1903. 

 Trigonella rufescens, Angas, Proc. Zool. Soc, 1865, p. 644. 



Hah. — New Holland (Lamarck), Van Diemen's Land (Reeve, also 

 R. Gunn in Brit. Mus.), Encounter Bay, near mouth of the Murray 

 River, South Australia (Angas), various localities in Victoria 

 (Pritchard & Gutliff), Shark Hav to Tasmania (Tate), Queensland 

 (Hedley). 



35. Mactea seeicea, Deshayes. B.M. 



Mactra nericea, Deshayes, Proc. Zool. Soc, 1854, p. 65 ; Reeve, fig. 10; 



Weinkauff, p. 54, pi. xviii, figs. 4, 4rt(?); Paetel, Cat. Conch., 



Samml. Ahtheil., iii, p. 33, 1890. 



Hah. — ? (Deshayes, Reeve, and Weinkauff) ; Australia (Paetel). 



Quoted as Australian solely on the authoritv of the Paetel 



Catalogue. 



I feel rather doubtful whether the shell figured by Weinkauff 

 really belongs to this species, although his description agrees with it. 



36. Mactea (Cyclomactba) teistis, Deshayes. B.M. 



Mactra tristis, Deshayes, Proc. Zool. Soc, 1854, p. 69; Reeve, 

 pi. xiv, fig. 69 ; Weinkauff, p. 93, pi. xxxi, fig. 6 (copy of 

 Reeve). 



M. {Cyclomactra) tristis, Dall, Trans. Wagner Inst. Sci., vol. iii, 

 p. 876, 1898. 

 Hah. — Moreton Bay, Queensland (Deshayes, Brit. Mus., and 



Reeve), New South Wales (Weinkauff), Queensland (Hedley). 

 This species attains a larger size than the type shell figured liy 



Reeve. The largest specimen in the Museum measures 68 mm. in 



length, 54 in height, and 28 in diameter. It is much browner 



externally than the shells described by Deshayes. 



37. Mactra tdegida, Gmelin. B.M. 



Mactra tumida seu infiata, Chemnitz, Conch. Cab., vol. vi, pp. 208, 



218, pi. xxi, figs. 210-12. 

 M. turgida, Gmelin, Syst. Nat., 1790, p. 3260; Weinkauff, p. 11, 



pi. iii, figs. 6-8. 

 M. tumida, Spengler, Skrivt. Naturhist.-Selsk., vol. v, Heft ii, p. 108, 



1802; Reeve, fig. 21. 

 jun. = M. cordiformis, Deshayes MSS. ; Reeve, fig. 6 ; Weinkauff, 



pi. xxii, figs. 1, \a (?). 

 M. { Ccelomactra) turgida, Dall, Trans. Wagner Inst. Sci., vol. iii, 



p. 875, 1898. 



