TOMLIN AND SHACKLEFORD : MARINE MOLLUSCA OF S. THOME. 275 



Tagalus angulatus (Sowerby). 

 Solecurtus angnlatus Sowerby in Reeve, Conch. Icon., pi. viii., f. 37 

 (1874). 

 S. Thome, rare; Senegal to I.obito (Dautzenberg). 



Mactra glabrata L. 



Linne, Syst. Nat., ed. xii., p. 1125 (1767). 



Weinkauff, Conch. Cab., 2nd ed., p. 66, pi. xxiii., f. 3 and 3a. 



S. Thome, common ; Cape Verdes ; dredged at many places from 

 Dakar to Mossamedes (Dautzenberg). 



Standella ambigua (VVeink.). 

 Mactra amhiqua (sic) Weinkauff, Conch. Cab. Mactra, p. 74, pi. 26, 



f. I, la (1884). 



S. Thome, rare ; Cape Verdes (Nobre) ; R. Gambia. 



Reeve, under Mactra silicula Desh., mixed up two species, giving 

 the description of Deshayes' shell, but as locality " mouth of the 

 Gambia " instead of " Bay of Manila " (Mus. Cuming). We have 

 emended an obvious typographical error in Weinkauff's specific name. 



Codakia (Jagonia) pecten (Lam.). 



Lucina pecten Lamarck, Anim. Sans Vert., v., p. 543 (1818). 

 Delessert, Recueil Coq. de Lamarck, pi. vi., f 8a — 8c. 



S. Thome ; W. of Cape Rouge (Dautzenberg) ; St. Vincent, C.V. 

 (Chalmers) ; Angola (Nobre) ; Spanish Guinea (Hidalgo) ; Mediter- 

 ranean. 



Abundant and' very variable in sculpture. 



Divaricella divaricata (L.). 

 Tellina divaricata Linne, Syst. Nat., ed. x., p. 1120 (1758). 



S. Thome, valves only; Madeira, very common (Watson); Canaries; 

 S. of England to Mediterranean ; West Indies. 



Lucina lamothei Dautz. 

 Dautzenberg, Mission Gruvel in Ann. de ITnst. Oceanogr., p. 100, pi. 



3, f. 50—54 (1913). 



S. Thome, not uncommon ; Conakry, Boulbine, Los Is., Grand 

 Bassam, Libreville, Banana, Congo estuary (Dautzenberg). 



Semele modesta A. Adams. 

 A. Adams, P.Z.S., 1853, p. 95. 

 Amphidesma modesta A. Ad., Reeve, pi. vi., f. 35. 



S. Thome, not uncommon ; Accra (Rattray) ; Principe, S. Thome, 

 and Fernando Po (Nobre) ; St. Helena (Smith). Mr. Smith^ unites 



J P.Z.S., 1890, p. 301, 



