The Collaborative International Dictionary of English v.0.48:

Delphin \Del"phin\, Delphine \Del"phine\, a. [See Dauphin.]
   Pertaining to the dauphin of France; as, the Delphin
   classics, an edition of the Latin classics, prepared in the
   reign of Louis XIV., for the use of the dauphin (in usum
   Delphini).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Delphine \Del"phine\, a. [L. delphinus a dolphin, Gr. delfi`s,
   delfi`n.]
   Pertaining to the dolphin, a genus of fishes.
   [1913 Webster]