TOMLIN AND SHACKLEFORD : MARINE MOLLUSCA OF S. THOME. 243 



Clathurella linearis (Mont). 

 Murex linearis Montagu, Test. Brit., p. 261, pi. ix., f. 4 ; Suppl. (1808), 

 p. 115. 



S. Thome, not uncommon ; Goree (von Maltzan) ; Rufisque (Daut- 

 zenberg) ; Canaries (McAndrew) ; Madeira, abundant (Watson) ; 

 Iceland and Norway to Mediterranean. 



Cancellaria cancellata (L.). 

 Voluta cancellata Linne, Syst. Nat., Ed. xii., p. 1191. 



S. Thome \ Rufisque, W. of Cape Rouge, Loanda (Dautzenberg) ; 

 Mediterranean. 



var. simiiis Sow. 



Cancellaria simiiis Sowerby, Conch. lUustr., no. 9, f. 38. 



S, Thome ; Senegal to Mossamedes (Dautzenberg); Cape Verdes. 



Both forms occur in the Mediterranean, the type form being com- 

 moner there as it is also in Senegal. The variety becomes prepon- 

 derant further south. 



Oliva flammulata Lam. 



Lamarck, Ann. du Mus. Paris, xvi., p. 314. 



S. Thome, common; Cape Verdes; Principe (Nobre) ; Cape Blanco 

 to Loanda ; Antilles (Romer). 



var. pallida Dautz. also occurs at S. Thome. 



Oliva acuminata Lam. 



Lamarck, Anim. Sans Vert, vii., p. 434. 



S. Thome, common ; Rio de Oro (Font) ; Senegal (Dautzenberg) ; 

 Whydah (Smith); Cape Verdes (Rochebrune) ; Principe (Nobre); 

 Angola (Welwitsch). 



Fossil : Marsa in Senegal (G. F. Dollfus). 



Nobre describes an entirely white variety from S. Thome and Angola 

 as var. ■pallida. 



Olivella pulchella (Duclos). 

 Oliva pulchella Duclos, Monogr. G. Oliva, pt. v., f. 11, 12. 

 ? Oliva leiicozonias Gray, Zool. Voy. Beechey, p. 130, pi. 16, f 16, 17. 

 . S. Thome, common; Senegal (Dautzenberg); Cape Verdes (Bouvier). 



Mr. J. M. Williams, who has made a special study of this genus, 

 denies tlie identity of O. pulchella and O. leucozonias. He says (in 

 litt.) that O. pulchella is uniformly larger and broader, bandless, plain 

 yellow within, and has an arched columella, whereas O. leucozonias 

 has three white bands, a line of brown spots within the margin of the 

 lip, and a fairly straight columella. 



