. Journal of morphology. brain of Destnognathusfusca from the ventral aspect. X 20. Fig. 2. The same from the dorsal aspect. X 20. Fig. 3. A mesal section of the brain, reconstructed from sagittal 20. Fig. 4. Sinistral aspect. X 20.• Figs. 5-7. Frontal (horizontal) sections at different levels. The blue linesrepresent the myelinic nerve-fibers, as shown by Weigerts hematoxylin dark lines represent the amyelinic fiber-tracts. X 20. Fig. 8. A frontal section at the base of the brain, showing the arrangement ofthe fibers at the chiasma, and the preoptic recess just cephalad ;


. Journal of morphology. brain of Destnognathusfusca from the ventral aspect. X 20. Fig. 2. The same from the dorsal aspect. X 20. Fig. 3. A mesal section of the brain, reconstructed from sagittal 20. Fig. 4. Sinistral aspect. X 20.• Figs. 5-7. Frontal (horizontal) sections at different levels. The blue linesrepresent the myelinic nerve-fibers, as shown by Weigerts hematoxylin dark lines represent the amyelinic fiber-tracts. X 20. Fig. 8. A frontal section at the base of the brain, showing the arrangement ofthe fibers at the chiasma, and the preoptic recess just cephalad ; also the thickeningof the caudal wall of the infundibulum where the hypophysis lies. X 20. Fig. 9. The most dorsal of the frontal sections, showing the origin of Mey-nerts bundle and a portion of the postcommissure. X 20. Fig. id. A section at a little deeper level. It shows the relation of the para-physis to the supraplexus, and of Meynerts bundle to the 20. Journal of Morphology, l^ol. X. PI. 282 J^^SH. EXPLANATION OF PLATE XIV. Fig. II. A sagittal section, showing the division of the peduncle into a dorsaland ventral branch in the diencephal. The relation of Meynerts bundle and thepostcommissure are well shown. X 20. Fig. 12. Shows the relations of the callosal fibers to those of the supracom-missure, and the apparent separation of the rhinocoele from the paraccEle by thelateral bulging of the callosal eminence. X 20. Fig. 13. Shows the thickening of the caudal wall of the infundibulum and thepreoptic recess. X 20. Fig. 14. A section near the median line, showing the relation of the plexusesto the cavities. X 20. Figs. 15-16. Show the direction of the two fiber tracts of the 15 is more dorsal, and shows a single bundle. X 20. Fig. 17. A transection through the rhinencephal at the attachment of theolfactory nerves. X 40. Fig. 18. A transection through the body of a 17-mm. larva to show the incomplete filling up of the spinal canal by


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Keywords: ., bookcentury1800, bookdecade1, booksubjectphysiology, bookyear1887