. Journal of morphology. ) Fig. 25. Transection through the rhinencephal. X 40. Fig. 26. Transection through the prosencephal, with the cephalic end of thesupraplexus just appearing. X 40. Fig. 27. Shows the supraplexus dipping down between the two hemicerebrums,and extending laterally through the portas to form the paraplexus. X 40. Fig. 28. Shows the relation of the callosum and precommissure to the adja-cent parts. X 40. Fig. 29. A transection through the diencephal, with the caudal end of ahemicerebrum on each side. X 40. Fig. 30. Transection through the mesencephal, with the infundibulum.
. Journal of morphology. ) Fig. 25. Transection through the rhinencephal. X 40. Fig. 26. Transection through the prosencephal, with the cephalic end of thesupraplexus just appearing. X 40. Fig. 27. Shows the supraplexus dipping down between the two hemicerebrums,and extending laterally through the portas to form the paraplexus. X 40. Fig. 28. Shows the relation of the callosum and precommissure to the adja-cent parts. X 40. Fig. 29. A transection through the diencephal, with the caudal end of ahemicerebrum on each side. X 40. Fig. 30. Transection through the mesencephal, with the infundibulum. X 40. Fig. 31. Same, farther caudad. X 40. Fig. 32. Mesencephal, showing the separation of the cinerea of the roof intotwo layers. X 40. Fig. 33. Section at about the level of the seventh and eighth nerves. X 40. Fig. 34. Caudal end of oblongata, near the myel. X 40. Fig. 35. Shows the cerebellum, with the overlapping geminum. X 40. Fig. 36. Transection through the metencephal. X 40. lournal of Morphology. l^ol PI. Colon^pe Co. NewYoHt. 284 FISH. EXPLANATION OF PLATE XV. Fig. 37. Transection through the myel and spinal ganglion to show the fibersand the passage of the dorsal root-fibers into the myel. X 190. Fig. 38. Shows the precocious division of the ventral root. From near themiddle of the length of the body. X 190. Fig. 39. Cell from the roof of the mesencephal. X 190. Fig. 40. Multipolar cell from the oblongata. X 190. Fig. 41. Cell from the occipital region of the cerebrum. X 190. Fig. 42. Cell from the mesencephal. Nerve cells, with their processes mostlybranching at the alba. X 190. Fig. 43. Transection of myel; tail region. X 190. Fig. 44. Transition cells from the mesencephal. X 190. Fig. 45. Multipolar cell from the oblongata. X 190. Fig. 46. Transection of the cerebellum, to show the beaded or varicose condi-tion of the fibers. X 190. Fig. 47. Cell from the dorsal portion of the myel, with its neurite crossing tothe opposite side ; near the vent. X 190. Fig.
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