In the Bothlink-Roth electronic edition (Koln Sanskrit Lexicons), under the word

trailokya

3) n. mystische Bez. eines best. Theils des Körpers Verz. D. Oxf. H. 236,a, No. 567. 

Might anyone know 

a) Exactly which list of Oxford Manuscripts this refers to? (this particular abbreviation appears to be missing from the explanations of the Abbreviations (https://www.sanskrit-lexicon.uni-koeln.de/scans/csldev/csldoc/build/dictionaries/prefaces/pwgpref/pwgpref11.html)

b) What text is 236A, No. 567?

c) Whether there is a digital edition of 236A, No. 567?

Cheers

James