174 Mr. J. Blackwall on certain Phenomena in the 
produced. On the 8th of August it moulted again and the entire 
limb was restored. The same leg was detached at the coxa on 
the 14th of August^ the 26th of September, and the 12th of 
November ; and was reproduced on the 19th of September, the 
8th of November, and the 20th of May 1846, respectively, at 
which periods the spider changed its integument. At the last 
date, the right palpus, which had been detached at the axillary 
joint on the 12th of November 1845, was also reproduced; both 
it and the right anterior leg were small but symmetrical, the 
latter having been reproduced four times. 
4. A very young male Tegenaria civilis had the left posterior 
leg detached at the coxa on the 5th of August, the 14th of Sep- 
tember, and the 29th of October 1845, and on the 18th of April 
and the 8th of June 1846. This spider cast its integument on 
the 10th of September and the 25th of October 1845, and on 
the 10th of April, the 5th of June and the 4th of July 1846, re- 
spectively, at each of which dates, except the last, the left poste- 
rior leg was reproduced, but on the 4th of J uly the coxa only was 
produced. The circumstances attending the restoration of this 
limb were similar to those recorded in experiments 2 and 3. I 
may add, that the spider frequently moistened the tarsus of the 
third leg on the left side with saliva and applied it to the injm’ed 
part. 
5. Half of the metatarsus, with the tarsus, of the right an- 
terior leg of an immature male Epeira antriada was amputated 
on the 20th of August 1845. On the 8th of the ensuing Sep- 
tember the spider moulted and the right anterior leg was re- 
produced. The coxa, femur and tibia of the new limb were of 
the same dimensions as those parts of the corresponding leg 
on the opposite side, but the metatarsus and tarsus were very 
small. 
6. An immature female Ciniflo ferox had about a third of the 
tibia, the metatarsus and tarsus of the left anterior leg amputated 
on the 14th of March 1846. It moulted on the 14th of the 
following May, when the coxa, femur and genual joint of the 
left anterior leg, which was reproduced, were of the same size as 
the corresponding parts of the right anterior leg, but the tibia, 
metatarsus and tarsus were very diminutive. This spider moulted 
again on the 23rd of J uly in the same year ; at the same time 
the tibia, metatarsus and tarsus of the new limb were consider- 
ably enlarged. 
7 . A young female Tegenaria civilis^ which had the right pos- 
terior leg amputated near the anterior extremity of the tibia on 
the 16th of March 1846, cast its integument on the 24th of the 
ensuing May and the mutilated limb was reproduced ; the coxa, 
femur and genual joint were of the same dimensions as the cor- 
