494 NOTE ON CEREBRAL LOCALIZATION IN THE BANDICOOT. 



whole vault was removed. The dura mater was cut away, all 

 haemorrhage checked by ligature, and the brain kept warm by 

 sponges moistened in hot salt solution. The positions of the 

 vessels and sulci of the exposed portions of the brain were 

 measured with callipers, and the whole was drawn to scale on 

 ruled paper. Anaesthesia was then diminished and the brain 

 surface stimulated by weak faradaic currents through fine 

 platinum electrodes embedded in paraffin. The movements 

 occasioned by stimulation were defined upon one side of the brain, 

 and the corresponding area was then sought for on the opposite 

 side of the brain. These positions were measured with callipers 

 and marked in the drawings. When all the areas had been 

 recorded they were individually mapped out again and the 

 results checked. In this way unnecessary stimulation was 

 avoided, and it was possible to obtain movements by the use of 

 faradaic currents only just perceptible to the tongue. 



Results. — The movements obtained by stimulation of the appro- 

 priate cortex (fig. 1) have been: — (1) Retraction of the head with 

 rotation of the face towards the opposite side 

 (A. fig 1). (2) Rotation of the opposite fore- 

 limb with backward movement of the 

 shoulder(B.). (3) Extension of the opposite 

 hindlimb and contraction of the muscles of 

 the back(C). (4) Abduction and adduction 

 of the tail(D.). (5) Closure of the opposite 

 eyelid(E.). All the movements obtained 

 were crossed Other limb-movements were 

 noted by stimulation in the vicinity of those 

 Ffe.i.-Dorsai surface of mentioned above, but were not constantly 



brain of Perameles obesula found 

 showing cortical motor 



areas-a olfactory lobe. These results were obtained in all of five 



b. sulcus orbitahs. A, B, 



c, r>, E, cortical areas, animals examined in August and September, 



see text references. ° 1 



Natural size. 1905. 



In conclusion I would express my thanks to Professor Ander- 

 son Stuart, in whose laboratory this investigation was carried on. 



