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Show 1900.] MR. F. E. BEDDARD ON BASSARICYON ALLENT. 667 surrounding peritoneal cavity. This state of affairs is an exaggeration of what is to be seen in some other mammals. In Fig. 4. Ovary (ov.) aud oviduct of right side of Cercoleptes. In the right-hand figure the sac containing the ovary and ths mouth of the Fallopian tube is cut open to display these structures. the Paca for example the ovary can be perfectly easily pushed into a little pocket, and quite concealed from view when the fold bearing tbe mouth of the oviduct is drawn over it. It is normally half concealed. The Brain. The brain of Bassaricgon resembles very closely that of Bassariscus l. The general outline is almost identical. The hemispheres diverge posteriorly to display the cerebellum. The crucial sulcus is situated rather anteriorly, and is well marked, curving round laterally after running forwards for a short way. In Bassariscus a " lozenge " is not formed, there being in the brain of that animal no forward process of the crucial sulcus on either side to enclose a space. In Bassaricyon there are distinct indications of such forward processes, particularly on the right side. But, as will be seen from the drawing exhibited (fig. 5, p. 668), there is nothing like tbe complete " lozenge " of larger Arctoids. As to this feature in the brain, there is no possibility of confounding Bassaricyon with Cercoleptes, which latter has a fairly well developed " ursine lozenge " ; and in addition the anterior part of the brain lying in front of the crucial sulcus is much more depressed below the level of the rest of the hemispheres than is the case with Bassaricgon. The chief longitudinal fissure of tbe brain, that which divides the sagittal from the parietal gyrus, does not reach the margin of the pallium posteriorly ; it does so however more nearly on the 1 " O n certain points in the Anatomv of the Cunning Bassarisc, Bassariscus astutus: P. Z. S. 1898, p. 129. |