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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (Nos. 333-142325, 333-148317, 333-113500, and 333-127859) and Form S-8 (Nos. 333-146155, 333-146154, 333-119607, 333-105842, 333-131416, 333-49852, 333-49856, 333-97523, and 333-97527) of Dyax Corp. of our report dated February 29, 2008 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts
February 29, 2008

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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM