Caption:

'Fig. E. Section of the Pancreas of Potto.

a, secondary cell group, made up of distinct anastomosmng columns with large interspaces in the network; b, ordinary alveolar cells highly granular and with narrow staining outer zone.' (357)

In text:

'The pancreas of the serval shews the cell groups very like those of the guinea-pig, but perhaps it approaches more to the second type of such groups.

(ii) In this class, the masses can be made out as distinctly composed of small, clear cells with deeply stained nuclei, not granular like those of the alveoli proper, joined together irregularly, or forming a network. The armadillo (fig. C, a) gives an excellent example of the more elementary grouping of such cells. The seal has these cells more distinctly cubical and in a close meshwork. The most marked examples of this definite meshwork of columns of cells however are seen in the pancreas of the potto (fig. E, a), and almost equally well in the pancreas of the glutton. In these cases the meshwork is much more open and the cells are larger and more distinctly separated from one another in the columns. In places there seems even to be an endothelium enclosing the columns.' (357-358)