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Octob. 19^th. When reading L'Institut 1838 p. 329. Milne Edwards¹ description of curious mechanism of respiration or rather ventilation peculiar to the class some orders of crustacea, one is tempted to think that it must have been invented all at once. — but naturalists if they had series perfect, would expect this structure would become obscure & therefore it might then have arisen, & M. Edwards p. 330 distinctly states that the flipper is a mere simple modification of an organ present in whole class.

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¹ Henri Milne-Edwards, L'Institut, tome 6, 1838, p. 329: "un système de palettes qui fonctionnent à la manière des ventilateurs et opèrent le renouvellement de l'eau par appel, en rejetant sans cesse au dehors une portion du liquide contenu dans la cavité branchiale".

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Case of Mexican greyhounds. — young being habituated instance such as Hunter,¹ or some one mention of influence on parent affecting offspring. — & as adaptation. — however mysterious such is case. therefore chance & unfavourable conditions to parent may be become favourable to offspring: Australian dogs having mottled coloured puppies case of this. — tendency in manner of life to be mottled & hereditary tendency determines the puppies to be so. —

¹ John Hunter, Observations on certain parts of the Animal Oeconomy with notes by Richard Owen, London, 1837.

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argument real of antiquity of reasonable cosmopolite man. —

L'Institut¹ 1838 p. 338. Important account of cross of sheep & Moufflon of Corsica, would not sadly against Yarrell's law. — not so much against my modification of it — Goat & Moufflon will not breed — 17

p. do — ² Fish of Teneriffe. St. Helena & Ascension most species like & identical with S. America & many very close. See full paper

L'Institut 1838. p. 338

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A most grave source of doubt in distinguishing which parent impresses offspring most is whether mother has had any offspring before — now this is never stated. —

¹ L'Institut, tome 6, 1838, p. 338. Zoologie: Metis du Moufflon et du Mouton. — "M. Flourens donne lecture d'une note de M. Marcel de Serres sur un métis provenu de l'accouplement du Moufflon et du Mouton …"

² L'Institut, tome 6, 1838, p. 338. Géographie Zoologique: Poissons des ties Canaries. — "M. Valenciennes lit des considérations sur l'ichthyologie de l'Atlantique et en particulier sur celle des iles Canaries …"

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Regarding the similarity of offspring to Parent same laws appear to hold good. with regard to marriage of individuals & varieties of same species & to different species — sometimes like one parent & sometimes other & sometimes 1/2 way.

Ed. New Phil. Transact¹ Rabies. common to men, dogs, horses cows, pigs, & sheep — disease common for men and animals cowpox — case in Spain of pustulous disease following handling sheep — all case do. p. 354 The most vicious dog will not attacke any animal except dog when absent

¹ Edinburgh New Philosophical Journal vol. 24, 1838, p. 353 "Observations on Rabies or Madness in Dogs, Oxen, Horses, Pigs, and Sheep. by Dr. Wagner …

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vegetation & conchology. — shells of Africa ought most to resemble fossil ones of Europe. Consider probable form of land. — S. America, an island, connects with Asia between two polar lands. — Africa not so equatorial. —

The fact of no Mam: Placent: insectivore being in S. America & Australia reason why Marsupiata when fresh introduced live & multiplied specifically & individually. —

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I see clearly from F.R.¹ it will be highly necessary to show that if species fall, genera must. Lesson² I remember says Mariana Deer very close to a Molucca species. —

L'Institut 1837, p. 253 on animals of Antilles.³ (see Macleay⁴ in Zoolog. Journal on those of Cuba. — It is important to understand well the relation of passage from N. to S. American forms.