'Fig. A. Section of Monkey's Pancreas, with a secondary cell group near the centre of the figure. Photomicrograph. Zeiss 4mm. Oc. 2. The difference between the alveolar and secondary cell groups is very marked.' (353)

In text:

'In the monkey's pancreas (fig. A) the alveoli are small and very closely set together, often angular in shape, many in section appearing transverse, fewer oblique, and few longitudinal. In an ordinary alveolus on transverse section there are seldom more than four small cells to be made out, and there may be but little attempt at differentiation. The inner part of the cell is highly granular and the outer part is stained deeply with homatoxylin.' (353)