A SPINNING HEAD FOR MELT SPINNING OF COMPOSITE FILAMENTS COMPRISED OF TWO POLYMERS OF EQUAL SEMI-CIRCULAR CROSS-SECTION IN WHICH THE MATING FACES OF A DISTRIBUTION PLATE AND A SPINNERET PLATE FORM TWO SEPARATE ANNULAR CAVITIES EACH COMMUNICATING WITH A DIFFERENT POLYMER SUPPLY CONTAINED IN THE DISTRIBUTION PLATE. A PLURALITY OF EXTRUSION HOLES IN THE SPINNERET PLATE HAVE THEIR UPPER END PORTIONS OF SEMI-CIRCULAR CROSS-SECTION COMMUNICATION WITH ONE OF THE ANNULAR CAVITIES AND THE REMAINING PORTIONS OF CIRCULAR CROSS-SECTION COMMUNICATING WITH THE OTHER ANNULAR CAVITY.