He has gone through the whole embryology of the Crustacea and has arrived at a pretty well-established genealogy of the whole class; has even tried to write a history of the whole tribe. Finds he cannot adopt the old separation of Orders in the Class; the limits between them are indistinct.

Would like to study embryology of Limulus. Asks CD’s help in obtaining a female specimen.

Outlines his proposal to establish a marine zoological station.

Would like CD’s opinion on his "theory of organic disturbance" and his "law of organic combination"; hopes CD might notice them in the Academy.

Writes of his unfortunate circumstances.

Discusses some calculations which he is doing for CD on the ratios of red and brown colouring in some animals.