The present data relates to the blood corpuscles of a mulatto woman who entered the Washington University Hospital, St. Louis, Nov. 3, 1914. The unusual character of the blood picture at once attracted attention and became the subject of extended study by several members of the hospital staff. The clinical data need not be elaborated, as the history of the case up to June, 1915, has been fully recorded by Drs.

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The Basle Anatomical Nomenclature (the B N A) has been preeminently successful in the simplification of anatomical terminology. Out of a total of 50,000 anatomical terms about 45,000 have been eliminated as unecessary synonyms. As a consequence, anatomical terminology as represented by the B N A now consists of a list of some 5,000 simple, unambiguous terms for the mae sroscopic structures of the human bcdy.This list of terms, intended for ccmraon use in the medical schools, is arranged on the basis of systematic anatomy. Doubtless, such an arrangement mas best adapted for the purpose of bringing about this revision of terminology.On the other hand, it appears obvious that from the standpoint of practical anatomy, a regional arrangement of these terms in conjunction with their systematic tabulation would greatly extend the usefulness of ths BNA, In dissecting laboratories and surgical clinics, the structures represented by the BNA terms are encountered in the various regions of the body, not as anatomical systems, but as segments of these systems grouped together in certain definite regional relationships. In attempting to correlate systematic text and cadaver, the one proves almost as difficult to dissect as the other.It appears important, therefore, that the present systematic BNA should be expanded to include a correlated regional arrangement of anatomical terms;an arrangement based upon the sequence in v?hich the structures indicated by these terms may be exposed and demonstrated to the naked eye in actual dissection. The present work represents such an attempt and is the outgrowth of several years of laboratory experience in which a regional arrangement of BNA terms in mine o graph copies has been given a thorough trial and its usefulness clearly demonstrated.The present work is presented in two parts dealing with the BNA terms II. as arranged, first, on the basis of regional anatomy, and, second, on the basis of systematic anatomy, with numeral indices facilitating cross references from the one to the other. The regional arrangement is given precedence since it is in their regional relations that anatomical structures are first encountered in practical study. The work also includes a complete series of figures for the surface anatomy, surface projection of the skeleton and lines of skin incision for the various regions of the body (omitted in the present copy).Part I constitutes a regional resume of anatomical structures. A tabulation for any given region necessarily involves only those structures or segments of structures which are embraced within the confines of that region. Structures such as the larger nerves or vessels extending through two or more regions would be relisted for each region in which they occur. In general the terms have been arranged with a view tc greatest utility for student and clinical reference in practical work. In presenting the subject of human anatomy it is frequently difficult to steer a course between the Scylla of too great detail and the Charybdis of a paucity of subject...

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