This note on the distribution of the Sanusiya order in north Africa and western Arabia is a supplement to the article on the history of the order which appeared recently in Africa (vol. xv, no. 2). Use has been made of earlier efforts to list its lodges. The earliest authorities were mostly relying on hearsay and later writers have sometimes copied their lists without further inquiry. On the whole, however, their records are fairly accurate and, though many of the names they give are so badly transliterated that they would be unrecognizable to anyone dependent on maps alone, they can easily be identified by anyone who knows the countries at first hand. Even when a name cannot be identified it need not be assumed that it is necessarily incorrect, because lodges are often known by more than one name, sometimes, especially in the Marmarica, by the name of their Shaikhs. I have also been able to make use of a list of 128 lodges drawn up for me by al-Sayyid Ibrahim (whose father al-Sayyid Ahmad al-Sharif was the last head of the order), though it contains a number of inaccuracies; and of my own observations and inquiries, which cover Cyrenaica and, more superficially, Tripolitania and Egypt.