The works of Francis Maitland Balfour, Volume 2 (of 4)
CHAPTER XVII. TRACHEATA.
Prototracheata, pp. 382-387. Myriapoda, pp. 387-395. Insecta, pp. 395-429. _Embryonic membranes and the formation of the layers_, pp. 400-406. _Formation of the organs_, pp. 406-417. _Special types of larvæ_, pp. 417-419. _Metamorphosis and heterogamy_, pp. 420-429. Arachnida, pp. 431-455. _Formation of the layers and general development_, pp. 431-446. _Formation of the organs_, pp. 446-455. Formation of the layers and embryonic envelopes in the Tracheata, pp. 456-458.