From G. B. Sowerby   [1846]

Note for M^r. Darwin relative to his addition to Struthiolaria ornata App. p. 12.

I see no objection to this addition being inserted, provided that the fact of M^r. Cuming having found a living species of Struthiolaria at Arica be given on the authority of M^r. Cuming himself and not on mine.¹

Mem: In my opinion the latin of Darwin is Darvinius—that of Sowerby— Soverbius—as w is not a latin letter—M^r Darwin must use his own discretion.²

I percieve M^r Darwin has altered the spelling of Navedad to Navidad— it is a subject with which I am entirely unacquainted & only mention it for M^r Darwin’s consideration.

Trigonocelia p. 4. The observation may properly stand as it is.³