[347] This follows from the definition in Festus, p. 321, and in Macrobius iii. 3. 2. This last is quoted from Trebatius _de religionibus_: "sacrum est quicquid est quod deorum habetur." In common use _sacrificium_ seems to be reserved for animal sacrifice, but the verb _sacrificare_ is not so limited. Festus, p. 319: "mustum quod Libero sacrificabant pro vineis ... sicut praemetium de spicis, quas primum messuissent, sacrificabant Cereri." It has been suggested to me by Mr. Marett that the termination of the word _sacrificium_ may have reference to the use of _facere_ for animal sacrifice, as in Greek [Greek: rhezein, erdein, dran]; but on the whole I doubt this. _Facere_ and _fieri_ are in that sense, I think, euphemisms, occasioned by the mystic character of the act (examples are collected in Brissonius _de formulis_, p. 9). _Rem divinam facere_ seems to be the general expression, as in Cato, _R.R._ 83; or the particular victim is in the ablative, _e.g. agna Iovi facit_ (Flamen Dialis) in Varro, _L.L._ vi. 16; cp. Virg. _Ecl._ iii. 77. [348] This classification, originally due to R. Smith, article "Sacrifice" in _Encycl. Brit._, ed. 10, has lately been criticised by Hubert et Mauss, in _Melanges d'histoire des religions_, p. 9 foll.; but it is sufficiently complete for our purposes. At the same time it is well to be aware that no classification of the various forms of sacrifice can be complete at present; that which these authors prefer, _i.e._ constant and occasional sacrifices, is, however, a useful one. [349] _R.F._ p. 95 foll. Cp. Robertson Smith, _Rel. of Semites_, Lect. VIII. [350] _R.F._ p. 217 foll. [351] _R.F._ p. 302 foll. Meals in connection with sacrifice are also found at the Parilia (_R.F._ p. 81, and Ovid, _Fasti_, iv. 743 foll.) and Terminalia (Ovid, _Fasti_, ii. 657); but in both cases Ovid seems to be describing rustic rites; nor is it certain that the meal was really sacramental. What does seem proved is that the old Latins and other Italians believed the deities of the house to be present at their meals-- ante focos olim scamnis considere longis mos erat et mensae credere adesse deos (_Fasti_, vi. 307),