2 L. W. SACKETT 



The insight which he showed will be more and more evident 

 as the discussion proceeds. In all, i6 animals have been used 

 as subjects for the more controlled parts of this study. Eight 

 of these were male, four were female, and in the case of four 

 the sex was not determined. In the following brief character- 

 ization where age is given it represents approximate age at 

 the time of capture — somewhat definite in the case of younger 

 animals but very indefinite in other cases. 



Nos. 1 and 2. Sex unknown, large, brown. Received May 26th. Escaped after 

 eight days preliminary observation. No experiments were made. 



No. 3. Male, age three years or more, dark brown. Received May 26th, escaped 

 June 23rd, recaptured in a tree near the cage. Escaped July 3rd, trav- 

 eled nearly a mile the first night. Recaptured after three days in a tree 

 near where he spent the first night. This was the most serviceable animal, 

 — the one most frequently referred to in experiments reported below. 

 Died April 29th the following year after all experiments were finishetl. 



No. 4. Male, age about 14 months, light gray in color. Received May 26th, 

 died August 15th as result of exposure in a cold rain. Served in maze 

 and puzzle-box experiments. 



No. 5. Male, age about three months, nearly black. Received August 1st, died 

 August 12th. Used only in preliminary work. This was the youngest 

 animal under observation. 



No. 6. Male, age unknown, old. Legs, face and tail of this animal were nearly 

 white, and long, bristle-like hairs tipped with white extended beyond 

 the quills over the entire body. Captured by the author September 20th 

 at the mouth of the dens by means of a snare on a fishing pole. Died 

 January 15th. Autopsy showed hemorrhage of the lungs. Served in 

 maze and form discrimination. 



No. 7. Male, age unknown, mature; color, mottled dark brown. Veiy slow in 

 movements. Captured by means of a snare in the natural runways Sep- 

 tember 18th. Very easily tamed but not very apt in learning on account 

 of what I take to be erratic attention and slovenly habits. Died after all 

 experiments were completed. Served in form discrimination and puzzle- 

 box tests. 



No. 8. Female, age about six months. Marked like No. 6. Captured in run- 

 ways from the same den on the same night. Died October 30th. Cause 

 unknown. Used in variations of hand reactions. 



No. 9. Sex unknown. Age about six months. Dark brown in color. Captured 

 in the same manner as No. 6 and on the same evening. Died in Feb- 

 ruary, having lived in captivity more than 16 months. Served in varia- 

 tions of hand reactions and habit-breaking of brightness reactions. 



No. 10. Sex unknown. Age about six months. Color nearly black. Received 

 September 14th from New Hamp.shire. Very wild and never became 

 thoroughly tame, but did good work nevertheless. Served mainly in 

 color and brightness tests. 



No. 11. Male, age unknown — old. Captured feeding in an oak tree in mid- 

 afternoon, September 13th. Lost one hind leg in cage in some unknown 

 manner. Used tail in walking as a substitute for leg. Died October 

 26th from effects of a fall in consequence of trying to catch a support 

 with his missing foot while making a difficult passage on a shelf. Served 

 in puzzle-box experiments. 



