[36] Prof. Huxley (Anat. Invert. Animals, p. 419) states that the integument splits along the abdomen also, but this is a mistake.
[37] Audouin. Rech. anat. sur le thorax des Insectes, &c. (Ann. Sci. Nat., Tom I., p. 97. 1824.)
[38] This application of the word to denote parts intermediate between terga and sterna has become general since its adoption by Audouin. It appears also in the older and deservedly obsolete nomenclature of Kirby and Spence. Professor Huxley has unfortunately disturbed the consistent use of this term by giving the name pleura to the free edges of the terga in Crustacea.
[39] Where the thorax apparently consists of four somites, as in some Hymenoptera, Hemiptera, Coleoptera, and Lepidoptera, the first abdominal segment has become blended with it.
[40] Balfour. Embryology, Vol. I., p. 337.
[41] E.g., by Graber. Insekten, Vol. II., p. 423.
[42] See, for example, Huxley on the Crayfish.
[43] One of the few points in which we have to differ from the admirable description of the Cockroach given in Huxley’s Comparative Anatomy of Invertebrated Animals, relates to the articulation of the mandible, which is there said to be carried by the gena.
[44] Morphologie des Tracheen-systems, p. 103.
[45] Zaddach, Entw. des Phryganiden Eies, p. 86; Rolleston, Forms of Animal Life, p. 75, &c.