1. A survey has been made of 518 operations for hallux valgus and hallux rigidus.
2. The methods of critical examination used in this survey are described.
3. The results obtained have led to the formulation of certain views on etiology and modes of treatment.
4. In hallux valgus in the adolescent, operations aimed at correcting the primary deformity are justifiable when correctly performed, though the exact form such operations should take still requires further study.
5. In hallux valgus in the adult, arthroplasty offers a reasonably good solution in the well chosen case, though no one should consider that the results are so good as to make unnecessary any further research in this field. Metatarsal osteotomy has in the adult only a limited sphere of application.
6. In hallux rigidus arthroplasty alone has no place in the treatment of the adult cases showing metatarsus primus elevatus, nor in the adolescent case. The possibilities of other methods of operative treatment, notably osteotomy, are discussed.