[EI] Hardy’s Travels in the Interior of Mexico, p. 32.
[EJ] Hill’s Swammerdam, part i. p. 23.
[EK] Swammerdam, part i. p. 24.
[EL] Intr., vol. i. p. 415.
[EM] Kirby and Spence, vol. i. Intr. p. 416.
[EN] Porcupines do not shoot out their quills, as was once generally believed.
[EO] Lister, Hist. Animalia Angliæ, 4to. p. 7.
[EP] Phil. Mag., ii. p. 275.
[EQ] Vol. i. Intr., p. 417.
[ER] Phil. Mag., ii. p. 339.