Three skulls of Ummulisani rutgersensis are described here as an addendum to the descriptions and analyses presented in Gaffney et al. (2006a). The present paper is essentially a replacement for the Ummulisani cranial morphology text in that paper (Gaffney et al. 2006a: 447–457). The original description was based primarily on one skull, AMNH 30563, the type of Ummulisani rutgersensis. Because two previously undescribed skulls, AMNH 30569 and AMNH 30562, are more complete, they add significantly to our understanding of this taxon. However, it does not alter the results of the phylogenetic analysis by Gaffney et al. (2006a), in that Ummulisani rutgersensis remains the sister taxon to Phosphatochelys tedfordi.