File:Cajal-fig1.png

Figure 1, "Vertikaler Schnitt durch die Retina des Barsches, Box salpa" (Vertical section through the retina of the Salema porgy, Sarpa salpa [accepted binomial]). From Santiago Ramón y Cajal, Die Retina der Wirbelthiere (The Retina of the Vertebrates), 1894, p. 180.

The description given on page 171, translated from the German:

Fig. 1. Vertical section through the retina of the Salema porgy, Sarpa salpa.

A. Photoreceptor layer; B. Membrana limitans externa (External limiting membrane); C. Layer of the grains of the photoreceptors; D. Outer plexiform layer; E. Inner granular layer; F. Inner plexiform layer; G. Ganglion cell layer; H. Optic fiber layer.

a. Cones; b. Inner segment of rods; c. End pellet of a rod fiber; d. Thick bipolar cell, intended for the rods; e. Thin bipolar cell intended for the cones; f. Base of a rod bipolar cell; j. Ascending bundle of such a cell; g. Lower branching of a small bipolar cell.