40 SHELLS OF SOUTH AMERICA. 
351. Nassa potyGona, d’Orb. Voy. v. 433. B.M. 
Buccinum polygonum, Lamk. 
Brazils. 
352. Nassa IsaBELLEI, @’Orb. Voy. v. 433. t. 61. 
f, 18-21. B.M. 
Patagonia. 
353. Nassa Fonvainel, @’Orb. Voy. v. 433. t. 77. 
f. 5, 6. B.M. 
Peru ; Payta. 
353*. Nassa FonTAINEI, part., d’Orb. MSS. B.M. 
Peru; Payta. 
Boo7*. \NASSA ——, 0. 8. B.M. 
Peru; Callao. 
These are most distinct species: there is a specimen of each. 
354. BuccINANOPS cocHLIDIUM, d’Orb. Voy. v. 434. 
t. 61. f. 25. B.M. 
Var. 1. Without any band on the suture. B.M.- 
Buccinum Lamarcku, Kiener. 
South Patagonia. 
Var. 2. With a smooth band or suture. B.M. 
North Patagonia. 
Var. 3. With tubercular band or suture. B.M. 
Patagonia. 
These varieties are very distinct species. Operculum subtri- 
gonal, ovate; apex rounded; the nucleus rather large, broad at 
the front part of the curved outer edge. 
355. BuccINANOPS GLOBULOSUM, d’Orb. Voy. v. 435. 
t. 61. f. 24. B.M. 
Buccinum globulosum, Kvener. 
Patagonia; Mouth of Rio Negro. 
Opercula exactly like former. 
