. On the anatomy of vertebrates [electronic resource] . Pliascolomys fusca. PROSENCEPHALON OF MAMMALS. 107 The crura cerebri, which, in the Opossum, <?, fig. 53, are leftexposed below, like the optic lobes above, by reason of the smallproportional size of the cerebrum, are more completely concealedin the brain of the Kangaroo and Wombat. The natiform pro-tuberances form a great proportion of the under part of thecerebral hemispheres in all the Marsupials; the ectorhinal fissurewhich indents their base in the Wombat and Kangaroo, runsalong the side of the hemisphere to the outer side of the
. On the anatomy of vertebrates [electronic resource] . Pliascolomys fusca. PROSENCEPHALON OF MAMMALS. 107 The crura cerebri, which, in the Opossum, <?, fig. 53, are leftexposed below, like the optic lobes above, by reason of the smallproportional size of the cerebrum, are more completely concealedin the brain of the Kangaroo and Wombat. The natiform pro-tuberances form a great proportion of the under part of thecerebral hemispheres in all the Marsupials; the ectorhinal fissurewhich indents their base in the Wombat and Kangaroo, runsalong the side of the hemisphere to the outer side of the olfactorylobe in the Opossum, indicating the large relative size of thebasirhinal fold or tract. Behind the commissure of the opticnerves is seen a broad and short infundibulum supporting thepituitary body, g, fig. 53, and posterior to this is the single corpusalbicans. The optic lobes, fig. 73, b, are solid; a pair of simi-lar but smaller ones rise behind, and form with them a c bige-minal mass: the anterior divisions or ( nates, B, fig. 75, have agr
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