I haven't completely figured out the book's layout, but it appears that it contains both volumes IX and X. In any case, the numbering starts over at index #160 (pg. 4), and the entry you're looking for is at index #230 (pg. 74):
Portavi lacrimis madidus te nostra catella, quod feci lustris
laetior ante tribus. Ergo mihi, Patrice, iam non dabis oscula
Hathi Trust is a large database of digitilised texts from universities all over the world (kind of an academic version of archive.org). Everything (as far as I know) is searchable. For "Corpus Inscriptionum Latinarum", there are many results. The first page shows volume 1, 2, 3, 5 and 7.