The fertilisation of flowers / by Hermann Müller ; translated and edited by D'Arcy W. Thompson ; with a preface by Charles Darwin.

Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: The fertilisation of flowers / by Hermann Müller ; translated and edited by D'Arcy W. Thompson ; with a preface by Charles Darwin. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    movements already mentioned, whose various actions we must now consider. (1.) When the bee is sucking honey which is only just within its reach, all the movable joints of its suction-apparatus, cardines, the chitinous retractors at the base of the mentum, laminae, labial palps, and tongue, are fully extended, as in Fig. 18, except that the two proximal joints of the labial palps are closely applied Fig. 18. from^boZ\xf)°mbUSagr0rUm'F' 9' withoomPletely tended and separated mouth-parts. Seen 2 —Mouth-parts of the Hive-bee, in the same position. Seen from below ( x ]2) wh?,h if'c °,T J0'ntH oft,',e lallial pa'l,s Mdlfletfa. a fcongue-sheath x pTece coverin,; the mouth winch lies between x and mt lepipharynw, Westwood)! y, submental (fulcrum Kir bvV 77 5& w^SS^S« to the tongue below, and the laminae to the mentum and hinder part of the tongue above. But as soon as the whorls of hairs at the point of the tongue are wet with honey, the bee by rotating the retractors (z z, Fig. 19) draws back the mentum, and with it the tongue, so far that the laminae now reach as far forward as the abial palps (i.e. to the point u in Fig. 18); and now laminaa and labial palps together, lying close upon the tongue and overlapping