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. 



