TOMLIN AND SHACKLEFORD : MARINE MOLLUSCA OF S. THOME. 249 



Distorsio ridens (Rve.). 



Triton ridens Reeve, P.Z.S., 1844, p. 115. 

 Triton ridens id., Conch. Icon., pi. xii., f. 46. 



S. Thome, three specimens, all rather worn ; Banana, Senegal, 

 Cape Verdes, Antilles, Costa Rica (Dautzenberg). 



Colubraria testacea (Morch), 

 Triton testaceus Morch, Yoldi Cat. 107 ; Malak. Blatt., xxiv., p. 25. 

 S. Thome, a single specimen ; West Indies. 



Cassis spinosa Gron. 

 Gronovius, Zoophyl., iii., p. 302, pi. 19, f. 9. 



S. Thome, fine examples ; Gaboon estuary (Dautzenberg) ; Principe, 

 Loanda, and Lobito (Nobre). 



Cassis testiculus L. 



Linne, Syst. Nat, ed. xii., p. 1199. 



S. Thome ; Cape Verdes, common ; Portuguese Guinea, Principe, 

 and Angola (Nobre) ; S Africa (Bairstow coll.) ; W. Indies, 



Amphiperas hordacea (Lam.). 

 Ovula hordacea Lamarck, Ann. du Mus. Paris, xvi., p. 112. 

 S. Thome, rare. 



Dolium galea (L.), 



Buccinum galea Linne, Syst. Nat., ed. xii., p. 1197. 



S. Thome, plentiful ; S. Vincent, C.V. ; Canaries (McAndrew) ; 

 Madeira (Watson) ; Portugal to Mediterranean (Watson); Beaufort, 

 N.C., to West Indies (Tryon) ; Santos, Brazil (J. D. Dean). 



Strombus bubonius Lam. 

 Lamarck, Anim. Sans Vert., vii., p. 203. 



S Thome, rather common; Principe (Rattray); Spanish Guinea 

 (Hidalgo) ; Cape Verdes (Nobre) ; Baie de Hann, Rufisque, W. of 

 Cape Rouge, and Gaboon (Dautzenberg). 



Triphora perversa (L.). 

 Trochns perversus Linne, Syst. Nat., ed. x., p. 760. 

 Bucquoy, Dautzenberg et DoUfus, Moll, du Roussillon i., p. 209, pi. 



xxvi., f. 8 — 17. 



S. Thome, common ; Canaries, Azores, and Cape Verdes ; Atlantic 

 from Norway to Morocco ; Mediterranean ; Senegal ; S. Helena 

 (Smith) ; South Africa (Sowerby). 



Specimens also occurred, not uncommonly, which are apparently 

 referable to var. obesula Monts, and var, lactea Monts, 



