Hi Oxy,

<< one will see that PadamAlA and DhAtumAlA have 19 chapters. If these
19 chapters belong to MahA-SaddanItti, then Geiger omitted one chapter
because he wrote "18". Is there any one who could be kind enough to
explain me what happened?

How many of them are there? >>

There are a total of 28 chapters (paricchedas) in H. Smith's Roman
script edition of the Saddaniiti, the last 9 of them (chapters 20 to
28) make up the Suttamaalaa.

Best wishes,
Jim