[5-6] rœði ... skelfir * gnap*mar Gylfa ‘the oar ... makes the towering horse of Gylfi <sea-king> [SHIP] shudder’: Line 5 is hypermetric in the mss, necessitating the deletion of two syllables, here á and -i. There are two main possible interpretations, each with rœði ‘oar’ as grammatical subject, but producing different images as to what is shuddering or trembling. (a) The Text above adopts skelfir ‘shakes, makes shudder’, from the verb skelfa, the causative counterpart of skjalfa ‘to tremble’, with gnapmar (acc. sg.) Gylfa ‘towering horse of Gylfi [SHIP]’ as its direct object. (b) Skj B on the other hand reads intransitive skelfr ‘trembles’, 3rd pers. sg. pres. indic. of skjalfa, and takes (gnap)mari (dat. sg.) Gylfa as equivalent to a prepositional phrase; but this involves emending ms. á mar to mari or assuming that endingless mar is dat., which is possible, though uncommon, in an a-stem m. noun at this date (Konráð Gíslason 1892, 224; Finnur Jónsson 1901, 12; ANG §§358.3, 4).