396. Various Forms of Anti-Scholasticism during this Period. -- Averroïsm was still the most formidable rival scholasticism had to encounter in the fourteenth and fifteenth centuries (§ 1). Then there arose also certain forms of heterodox mysticism of no great historical importance (§ 2). Finally we may note some parasitic systems, which, although not themselves durable, are symptoms of approaching decay (§ 3). The kinship of many of these latter with Averroïsm is easily recognized.