A BOAT CARRYING ABOUT 47 AFRICAN UNDOCUMENTED IMMIGRANTS AND THREE BODIES LANDED FRIDAY ON THE SPANISH CANARY ISLAND OF TENERIFE, HOSPITAL SOURCES SAID, ACCORDING TO DPA. A FOURTH IMMIGRANT WAS HOSPITALIZED IN CRITICAL CONDITION. AUTOPSIES WERE TO BE CARRIED OUT ON THE THREE DEAD PASSENGERS. THE REST OF THE PASSENGERS, ALL OF WHOM WERE MALE, APPEARED TO BE IN GOOD HEALTH. THE BOAT WAS SPOTTED OFF SOUTHERN TENERIFE AND TOWED TO THE PORT OF LOS CRISTIANOS BY A POLICE VESSEL. ABOUT 10,000 AFRICANS HAVE LANDED ON THE CANARY ISLANDS THIS YEAR.