RECORD: Darwin, C. R. n.d. Abstract of Blanchard, 'Annales Des Sciences Naturelles Zool'. CUL-DAR48.A24. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2021. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR48 contains notes for Natural selection chap. 8 'Transitions of Organs'. Notes on bees' cells for origin of species theory.
Blanchard, É. 1849. De l'appareil circulatoire et des organes de la respiration dans les Arachnides. Annales des Sciences Naturelles, 12: 317-50.[A24]
Annales des Sc. Nat. 3d. S. Zoolog. Tom. 12 p 317 1849
E. Blanchard "de l'appareil circulaire et respiration dans les Arachnides."
I had better refer to this paper it seems there are true Pulmonary spiders with sacs & various number of orifice - there are true Trachean spiders (as Phalangium) (with only 2 orifices) & there are 2 genera with 2 Pulmonary sacks & 2 leading into tracheae; but these tracheae are not quite same as in sects; they have not spiral thread, but are much branched. These 2 genera are closely allied to the Epeiran division with solely pulmonary sacks. I had better say that by nature the air is more brought to blood, in sack blood is more brought to lungs - for Blanchard, seem to think it is brought even to tracheae to between lining of tubes.
Ch. 8.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
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