Gratified by CD’s approval of his articles, which the public has not much liked.
Clarifies the obscure sentence CD criticised – forms having a different genesis can be similar.
Calls CD’s attention to Kovalevsky’s memoir on Amphioxus [Mem. Acad. Imp. Sci. St.-Pétersbourg 7th ser. 11 (1868) no.4]. K’s views are all in favour of CD’s and against GHL’s.