(a) PAS-stained histological section through the intestine of stage 32 embryos of oviparous batoid (Raja pulchra), and (b) its schematic representation. Note that faecal matter is restricted to the most posterior region of the intestine. (c) The second row of spiral valve, and (d) the 10th row of the spiral valve. (e) The posterior end of the intestine (left) and its close-up view (right). Densely populated PAS-positive goblet cells (white triangles) are seen in the right panel in e. Scale bars =100 µm in c, d and left panel of e; 10 µm in right panel of e.