Fig. 423. Alimentary Canal of the Leech.

Pereira Fig 423

a. Oesophagus. b, c, d, e, f, g, h, i, k, l, m. Cells of the stomach. n, Caecal sacs. o. Funnel-shaped pylorus. p. Irregularly expanded commencement of (q) the small intestine. r. Caecal sac of the last cell of the stomach. s. Large intestine. t. Rectum.

This image is from _ in Pereira's Elements of Materia Medica and Therapeutics, 1854.