When Gerard Weil edited the masora of Codex Leningradensis for Biblia Hebraica Stuttgartensia (BHS), he encountered certain problematic notes in the Masora Parva (Mp). He labeled these "sub loco" in the apparatus for the masora. Weil planned to discuss these notes in the third volume of Massorah Gedolah, the lists of the Masora Magna. Unfortunately, he died before he was able to publish this volume, leaving the reader of BHS only with the knowledge that some unexplained problem or special feature exists whenever the term "sub loco" is encountered. This dissertation examines all of the sub loco notes in the Torah of BHS and provides the sort of analysis and discussion of them that Weil intended to do. There is an entry for each such note which compares the Mp of Codex Leningradensis, BHS and (where extant) the Aleppo Codex. The present edition is a reprint of Mynatt's 1994 edition, with added foreword and corrigenda.