[1] As headword and gloss the transmitted nominative singulars o(/rkos and tu/pos do not make obvious sense. Adler notes Gaisford's emendation of o(/rkos to the genitive o(/rkou, producing an unglossed headword phrase o(/rkou tu/pos ('a type of oath'). No equivalent entry, either way, in other lexica.
[2] Quotation not identified by Adler but identifiable via the TLG as Julian, Letter to the Senate and People of Athens 275C Hertlein (6 Bidez). In the preceding sentence Julian characterizes the wishes expressed here as "oaths" (o(/rkous), which explains the pertinence of the quotation to the headword. Perhaps by characterizing this 'oath' as a "type" the lexicographer is reflecting the fact that Julian is using the word in an unusual sense (see LSJ s.v. tu/pos VIII, for the meaning "vague impression", "general sense".)