72 REPORT 1844. 



spinner amputated, and the third leg on the right side detached at the coxa, 

 on the 25th of July 1S39. This spider cast its integument on the 6th of the 

 ensuing August, when the stumps only of the mutilated parts were produced. 

 On the 2nd of December, in the same year, it moulted again ; the superior 

 spinners and third leg on the right side, of a small size, were then reproduced, 

 and it arrived at maturity. 



7. The left palpus of a young male Tegenaria civilis, the digital joint of which 

 was very tumid, was amputated at the axillary joint on the 15th of January 

 1840. On the 22nd of June, in the same year, it moulted, reproducing the left 

 palpus, which was of small dimensions. The radial joint was provided with an 

 apophysis, indicating the mature state of the spider, but the digital joint was 

 somewhat modified in size and form, and the sexual organs were not reproduced. 



8. A young male Tegenaria civilis had the right palpus amputated at the 

 axillary joint on the 15th of January 1840. It moulted on the 2nd of the 

 following June, when the detached part, of a small size, was reproduced and 

 the digital joint became very tumid. On the 12th of August, in the same 

 year, it moulted again ; the right palpus was augmented in size, the radial 

 joint was furnished with an apophysis, and the sexual organs, complete in their 

 organization, were developed ; these several parts, however, were still decidedly 

 smaller than the corresponding parts of the left palpus. 



9. On the 25th of January 1840 the left palpus of a young female Tegenaria 

 civilis was amputated at the axillary joint. This spider moulted on the 1st 

 of the ensuing May, at which time the detached part, of a small size, was re- 

 produced. On the 20th of June and the 6th of August, in the same year, it 

 moulted again and arrived at maturity, the left palpus receiving an increase 

 in size at each successive moult. 



10. A young male Cinijio ferox had the cubital, radial and digital joints 

 of the left palpus amputated on the 26th of May 1840. It moulted on the 

 18th of the following June and reproduced the left palpus, which was small, 

 with the digital joint very tumid. On the 8th of August, in the same year, it 

 moulted again, when the left palpus was enlarged, the apophyses of the radial 

 joint were produced, and the sexual organs were developed. Though the 

 several parts of the left palpus were smaller than the corresponding parts of 

 the right palpus, yet they were perfect in their organization. 



11. The left palpus of a young male Cinijio atrox was amputated at the 

 axillary joint on the 28th of May 1840. This spider changed its integumeut 

 on the 27th of the following June, and reproduced the left palpus, which had 

 the digital joint very tumid. On the 11th of August, in the same year, it 

 moulted again, when the apophyses of the radial joint and the sexual organs, 

 perfect in structure, were developed, but all the parts of the left palpus were 

 smaller than the corresponding parts of the right palpus. 



12. A young male Linyphia cauta had the right palpus at the axillary 

 joint, the cubital, radial and digital joints of the left palpus, and the tibiae and 

 tarsi of the first, second and third legs on the left side amputated on the 30th 

 of May 1840. On the 25th of the ensuing June it moulted, when the stumps 

 only of the palpi were produced, but the nmtilated legs, of small dimensions, 

 were reproduced. It moulted again on the 21st of July, in the same year, 

 and though the palpi still were not reproduced, yet the newly-formed legs 

 were augmented in size and the spider arrived at maturity. 



13. The digital joint of the left palpus of a young male LinypJiia cauta, 

 which was very tumid, was amputated on the 20th of July 1840. The spider 

 moulted on the 19th of the following August, reproduced the left palpus, of 

 a small size, with the digital joint considerably modified, and at the same 

 time arrived at maturity ; but the sexual organs were not reproduced. 



J 



