459. Latin proper names in #-ius# have the vocative in #-ī# only: as,

#Vergilius#, V. #Vergílī#; #Mercurius#, V. #Mercúrī# (87). So, also,

#fīlius#, #fīlī#, _son_; #genius#, #genī#, _good angel_; #volturius#,

#volturī#, _vulture_; #meus#, #mī#, _my_.

460. Town names and a few appellatives have a locative case in #-ī#: as,

#Ephesī#, _in Ephesus_; #humī#, _on the ground_; #bellī#, _in war_.

[Erratum:

455 ... #noenum#, _naught_ (99).

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