Is much obliged for AG’s two memoirs ["Mémoire sur le reptile découvert par M. Frossard", Nouv. Arch. Mus. Hist. Nat. 3 (1867): 21–40; Bull. Soc. Géol. France 2d ser. 24 (1867): 397–400].
All "inosculating forms" are very interesting to CD.
Agrees with AG on the importance of attempts to affiliate extinct and existing species.
Will send French edition of Variation when published.