1342 SPATHA 



ed, but shallow : nacre bluish or greenish, often tinted or 

 clouded with salmon. 



Length 85, height 38, diam. 19 mm. 



Length 55, height 25, diam. 18 mm. 



West Africa. 

 Anodonta dahomeycnsis Lka, Pr. Ac. N. Sci. Phila., Ill, 1859, 



p. 154; 11. Ac. N. Sci. Phila.. IV, 1859, p. 261, pi. xli, fig. 



141 ; Obs., VII, i860, p. 79, pi. xLi, fig. 141. — Clessin. 



Conch. Cab. Ano., 1873, p. 103, pi. xxxi, figs. 5. 6. 

 Anodoii dahomeyensis Sowkrby, Conch. Icon.. XVII, 1870, pL 



XXXVI. fig. 151. 

 Margaron (Anodonta) dahomeyensis Lea, Syn., 1870, p. 82. 

 Spatha dahomeyensis Simpson, Syn., 1900, p. 900. 

 Anodonta senegalensis Lea, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 



154; Jl. Ac. N. Sci. Phila., IV, i860, p. 260, pi. xu, fig. 140; 



Obs., VII, i860, p. yS, pi. xhi, fig. 140. — Clessin, Conch. 



Cab. Ano., 1873. pi. xxxi, figs. 7, 8. 

 Anodon senegalensis Sowkrp.y, Conch. Icon.. XVII, 1867, pi. 



XI, fig. 35: 1870, pi. xxxiii, fig. 130. 

 Margaron (Anodonta) senegalensis Lea, Syn., 1870. p. 82. 

 Spatha senegalensis Gr;RMAiN, Arch. Zool. Exp. and Gen., (5), 



I, 1909, p. 57. 

 MnteUna senegalica Jousseaume. Bull. Soc. Zool. de Fr., XL 



1886, p. 488. 

 Spatha divaricata von Martens, Besch., 1897, p. 250, pi. vii, 



fig. 15. — Simpson, Syn., 1900, p. 901. — Germain, Arch. 



Zool. Exp. et Gen., (5), L 1909, p. 57. 



A very variable and probably widespread, abundant species. 

 Lea's Anodonta senegalensis is a little more elongated and in- 

 flated than some specimens, but does not ditTer varietally I 

 think. The surface varies from being almost smooth to con- 

 centrically sculptured and some shells show traces of radial 

 .sculpture. The epidemiis varies from dull greenish to green- 

 ish-brown. S. dit'aricata von Martens seems to be the young 

 or a small form of 5*. dahomeyensis. I have seen small speci- 

 mens of that, which agree in every essential particular. Mar- 

 tens" shell is from Lake \'ictoria Nvanza. 



