jc6 HODGE. [Vol. VII. 



were less regular and well defined. The lobes were located 

 by the aid of Riley's (71) description of the locust's brain. 



Besides those tabulated, several preliminary experiments were 

 made, two upon bumble-bees and two upon honey-bees. As 

 these all show evening fatigue, the ratio of fatigue cases is 

 much increased. 



This closes the list of diurnal fatigue experiments. The 

 writer regrets the absence of a mammal from the series. One 

 experiment upon a dog was attempted, but terminated unfortu- 

 nately.^ I hope, however, in the near future to be able to make 

 some experiments upon mammals which shall supply this de- 

 ficiency. At present I have the following observations to 

 append. 



The " Worcester Fur Company " is an organization of gentle- 

 men upon the principle that foxes should be chased at least one 

 day in the year. At their meet the Company placed two of 

 the carcasses at Dr. Donaldson's disposal. The brains were 

 used for comparative anatomy specimens. I obtained spinal 

 ganglia of each, which, compared with those of a dog of about 

 the same size, show nearly as much difference as is seen be- 

 tween Figs. I and 2. No data were obtained as to how long the 

 foxes had been chased. The method of hunting in that section 

 being to shoot the fox at sight, no estimate of this quantity can 

 be made. They may have been shot as they jumped from cover 

 or after the hounds had chased them for several hours. Signs 

 of great fatigue, compared with what has been found in birds 

 and bees, are certainly not present. 



Without exception the motor cells in the ventral horns of 

 human spinal cords that have come under my observation 

 present considerably shrunken nuclei. In the spinal cord of a 

 hydrophobia patient,^ however, this phenomenon is presented 

 in an extreme degree. Characteristic ecchymoses in the gray 

 matter were numerous (17, Vol. II, p. 847). According to 

 Gowers, changes in ganglion cells in hydrophobia are trivial. 

 Popow (66) in a single case notes little of interest to us 



^ After working the dog from five o'clock in the morning until three in the after- 

 noon, racing him through woods and swimming him in ice-water, which he did 

 willingly, the dog bolted and was not seen again for three months. 



2 For the above material I am indebted to the courtesy of Dr. R. H. Chittenden 

 of New Haven, Conn. 



