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Huxley

ramified aquiferous channels of annelids receiving circumambient water, are considered by you? as homologues of Tracheæ.— Are they ringed? where open?— Row of lateral sacs in leech & earth-worms, transitional stage: Owen considers homologue with tracheæ.—

Does not know whether here are others.

Milne Edwards Introduct. Z. G. p. 65. Branchiæ themselves in Squilla new organ added to preexisting Crust type.— What say?

about classifying Races of Man. by Descent

I may state must agree to large extent with structure

{About development only test for Homologies

Cryptophialus — Pupa [illeg] flies. As development phases in some those others, may it not be lost in some

Barneoud.—

Glaciers. Trilobite. Impregnation

[178v]

xxxx (11)

In class Pigeon short-beaked Tumbler wd form a genera, but we see it cannot naturally be separated from common Tumbler.

I believe object is to collocate mid groups on same principal, as individuals are now generally collocated under species.— anyhow on my idea, same exact principle is used.—

If we look at classification as new means of putting number of facts under one head.

If anyone cd class Pigeons &c by descent, they wd I think for all purpose, for it wd certainly correlate structures as certainly as individuals of species Keep same structure together. although it might render some characters of less value, than might have been anticipated xxxx

no doubt if as Huxley suggested, that Bears were descended from Cat & opossum fox from Marsupials genealogical classification it wd not be available.