In making the following suggestions I have assumed the chronological possibility of allusions in the Aetia Prologue on the one hand to the quarrel with Apollonius Rhodius, and on the other to Arsinoe II. (obiit 271–270 B.C.). That such a combination is possible is maintained by Rostagni in Rivista di Filologia, 1928, pp. 1 sqq. The textual supplements offered here, while intended to support the double hypothesis, differ from his in some points; notably in regard to the question of where the allusion to Arsinoe is to be introduced into the text of Callimachus (see below). It need hardly be said that the supposed allusions to the queen and to the rival poet do not necessarily stand or fall together. In the case of the former it might not be altogether incredible (pace R.) that such an allusion should have been made after her death; whilst the most obvious consequence in regard to Apollonius would be that, if a date before 270 B.C. be accepted for the Prologue, his birth would have to be placed as early as possible—say, 295–290 B.C. However this may be, it is here sought to complete, in the above sense, certain passages in the Prologue (P.) with the aid of the British Museum Scholiast (S.). In regard to the latter a fresh study of the original text by the editor (Mr. H. J. M. Milne) has been utilized, to say nothing of his valuable suggestions and criticisms; in the case of P. the facsimile in Ox. Pap. XVII. is depended upon. The silence of S. on some of the supposed points may fairly be adduced in objection to them; but it may be noted that he does not comment on Πυγμαίων (P. 14), and that his exposition, where it can be checked, seems to be somewhat hasty and unbalanced. Further, we do not know what may have preceded the portion of his work which has survived.