20 
the harbour of Saint Francisco, must produce 
many varieties. 
WHEN at the isle of St. Catherine, and the 
bays near it, I employed the fishermen, and 
obtained from them many valuable varieties of 
limpets, barnacles, &c. star-fish, coral, and 
sea-weed; also muscles and land-shells from 
the lagoons, to which I gave the preference, 
as some of them were unknown species. 
From the Rio Grande, though so large a la- 
goon, we have not received a single species. 
IN searching for shells in the river Plata, I 
was altogether unsuccessful, notwithstanding a 
gale of wind, called a Pampero, had left the 
river dry in many places, from two to three 
miles in extent; nor were the fishermen, 
whose attention I engaged, more fortunate.— 
