The MS. hie tunc of V. 6 has no friends. L. Mueller's hoc tunc is weak and flat, and L. Rank, Mnemosyne 40. 51, is justly dissatisfied with the hietans of M. Havet's larger and smaller editions, to which the hians of Verg. Aen. 12. 754 lends no sufficient support, as there the dog is opening its mouth before it bites. Add to this that it is by no means certain that Phaedrus would either have used the word or used it in the simple sense of opening the mouth. Rank's own proposal, ‘heu’ tunc, fails also to carry conviction. There is however a word which belongs to our author's vocabulary (App. 23. 5) and is as near to the manuscripts as either of the above, and which hits the sense at which hietans aims. This is rictus. The word is often used of the opened mouths of dogs, Lucr. 5. 1064, Ovid Met. 13. 568. Juvenal 10. 271 sq. ‘canino latrauit rictu,’ and of other animals. That it is appropriate with dimisit ‘let go’ may be seen from the counterpart expression of Martial 1. 48. 1 ‘rictibus his tauros non eripuere magistri.’