The source of this quotation, as posted by Polangmar, is Richard Hakluyt, The Principall Navigations, Voiages, and Discoveries of the English Nation (1589), vol. 5. More information on Hakluyt and his works here:
http://en.wikipedia.org/wiki/Richard_Hakluyt

The word spelt "pallandaries" by Crowley (according to your text) is indeed spelt "pallandres" by Hakluyt.

It refers to a flat-bottomed vessel used by the Turks to transport horses. The standard spelling in English is "palander", or sometimes "palendar":

"A palander, which the OED calls "rare," is a flat-bottomed ship used on the Mediterranean, originally by the Turks, for carrying horses. Sometimes it is spelled palendar, but the vast majority of appearances are palander."
http://www.drbilllong.com/2007Words/2005XX.html

As well as in the Oxford English Dictionary, it is listed (as "palander") in the unabridged Merriam-Webster dictionary, where it is defined as "a flat-bottomed boat formerly used for horse transport", and also given the obsolete meaning of a fire-ship (a ship set on fire and used to destroy enemy ships in naval battles). It is said here to be derived from the Italian "palandra".
http://www.merriam-webster.com/dictionary/palander

Dr Johnson, in his mid-eighteenth century English dictionary, lists "palendar" and defines it as: "A kind of coasting vessel. Obsolete". His usage example, from Knolles's History, again indicates that it was a Turkish vessel and carried animals:

"Solyman sent over light-horsemen in great palendars, which running all along the sea coast, carried the people and the cattle."
http://archive.org/stream/dictionaryofengl02johnuoft#page/n2...



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Note added at 5 hrs (2012-11-05 08:36:18 GMT)
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Although Johnson defines it as a "coasting vessel", a palander or palendar was probably not intrinsically a coaster; he evidently assumed that it was because his source said "all along the sea coast".

The essential points are clearly that it was a flat-bottomed Turkish transport vessel for horses. This is further confirmed by John Florio's definition of the Italian word "palandra" in his Dictionarie of the Italian and English Tongues (1611; first ed. 1598):

"Palándra
a long Turkish garment, or horse-mans coate beneath the knees. Also a kind of flat bottomed Barges or Ships vsed in time of war to transport Horses to and fro, and to make suddaine bridges"
http://www.pbm.com/~lindahl/florio/366small.html

So it was essentially a kind of barge, and as well as transporting animals it could be used to make an improvised ("suddaine") bridge.