278 A. J. Carlson. 



No. of pairs Transmission Length of cord 



of records. time in sec. in cm. Rate in cm, 



I 8 0.020 5 2.50 



2 6 0.020 5 2.50 



3 II 0.030 6.5 2.16 



4 13 0-023 5 2.15 



5 4 0.025 ^-5 2.60 



6 ..... . 2 0.020 5 2.50 



7 3 0.019 6 3.15 



8 2 0.026 5 1.94 



9 4 0.015 5 3.33 



10 4 0.015 4 2.64 



II 3 0.016 4 2.40 



12 8 0.017 4.5 2.60 



13 3 0.024 6 2.46 



Mean rate 2.50 m. per sec. 



TABLE III. 



Summary of measurements of the postero-anterior rate in the 

 nerve-cord of Scolopendra. 



No. of pairs Transmission Length of cord 



of records. time in sec. in cm. Rate in cm. 



I 5 0.040 6 1.50 



2 4 0.032 4.5 1.40 



3 4 0.040 7 1.75 



4 3 0.037 4 i-o8 



5 4 0.040 6 1.50 



Mean rate i .40 m. per sec. 



TABLE IV. 



Himantarium taeniopse. Antero-posterior. Detail of experi- 

 ment No. 2, Table V, November 5, 1902. Temperature 18" C. 



