Any collection of histologic sections requires adequate cataloging to render it useful for study and reference. A classification is required for this cataloging or cross-indexing, and one based on clinical findings will not suffice for pathologic changes. To meet this need with respect to pathologic material from ocular lesions, a purely utilitarian classification has been evolved by the author during the past eighteen years. Begun as a skeleton outline, it has been gradually expanded as the needs arose and in its present form seems to answer the requirements of the department of pathology of the Institute of Ophthalmology. Since there have been requests for copies of it from time to time, it is probably of sufficient interest to warrant its publication.
Formerly one classification and index was used for globes and another for biopsy tissue and specimens other than globes. It seemed advisable to combine the two, however, and the