160 



MISCELLANEOUS PAPERS. 



Table XI, — Data of individual experiments on Sipha flava, viviparous gener- 

 ation, 1906-7 — Contiuuecl. 



Date of birth. 



1906. 



August 6 



August 8 



August 13 



August 15 



August 16 



August 14-16 



August 21 



August 22 



August 23 



August 24 



August 30 



Septemljer 2 



Do 



Sep tern lier 6. . . . 



Sep tern Ijer 



September 10 



September 10-11. 



September 11 



September 14 



September 18 



September 19 



September 21 . . . 



March 18. 

 March 19. 

 April 15.. 

 May 13. . . 

 April 16. . 

 May 17. . . 

 May 28. . . 

 May 29. . . 

 May 30. . . 

 June 11. . 

 June 13 . . 

 June 24.. 

 June 17.. 

 June 23.. 

 June 28.. 

 July 2. . . . 

 July 4. . . . 

 July 5. . . . 

 July 7.... 

 July 8. . . . 

 July 10. . . 

 July 11... 

 July 11. . . 

 July 13. . . 

 July 15. . . 

 July 16. . . 

 July 19. . . 



Do... 

 July 22. . . 



Do... 

 July 24. 

 July 28. 



1907. 



Date of 



first 

 young. 



1906. 

 Aug. 15 

 Aug. 16 

 Aug. 21 

 Aug. 23 

 Aug. 24 

 Aug. 22 

 Aug. 30 

 Sept. 2 

 Sept. 1 

 Sept. 4 

 Sept. 9 

 Sept. 10 

 Sept. 11 

 Sept. 14 

 Sept. 18 

 Sept. 19 

 Sept. 23 

 Sept. 21 

 Sept. 24 

 Oct. 2 

 Sept. 30 

 Oct. 4 



1907. 



Apr. 15 



Apr. 16 



May 16 



May 26 



May 14 



May 29 



Juiie 11 



June 13 



June 11 



June 21 



June 23 



July 5 



June 27 



July 1 



July 6 



July 9 



Aug. 11 



July 12 



July 15 



July 16 



July 19 



July 19 



July 20 



July 21 



July 22 



July 24 



July 27 



July 28 



July 29 



July 30 



Aug. 4 

 Aug. 



July 27 i...do. 



July 29 



July 31 



July 20 



August 5 



August 6 



August 9 



August 18 



August 19 



August 24 



August 28 



August 31 



September 3 



September 6 



Septemljer 14. . . 



Averages. 



Aug. 

 Aug. 9 

 Aug. 28 

 Aug. 13 

 Aug. 14 

 Aug. 18 

 Aug. 28 

 Aug. 29 

 Sept. 1 

 Sept. 6 

 Sept. 11 

 Sept. 14 

 Sept. 17 

 Sept. 23 



Age at 

 birth of 



first 

 yoimg. 



Days. 

 9 



8 

 8 

 8 

 8 

 6-8 

 9 

 11 

 9 

 10 

 10 

 8 

 9 

 8 

 9 

 9 

 12-13 

 10 

 10 

 14 

 11 

 13 



9 

 7 

 8 

 11 

 9 

 10 

 9 

 9 

 8 

 8 

 8 

 9 

 10 

 10 

 8 

 9 

 11 

 11 

 11 

 9 



13. 29+ 



Last 

 young. 



1906. 

 Sept. 9 

 Sept. 16 

 Sept. 13 

 Sept. 20 

 Sept. 13 

 Sept. 11 

 Sept. 23 

 Oct. 4 

 Sept. 28 

 Oct. 3 

 Oct. 14 

 Oct. 6 

 Sept. 30 

 Oct. 7 

 Nov. 8 

 Sept. 29 

 Sept. 29 

 Oct. 31 

 Nov. 3 

 Nov. 17 

 Nov. 20 

 Nov. 10 



1907. 

 June 6 

 May 14 

 June 6 

 July 11 

 Jiuie 28 

 June 22 

 Julv 18 

 July 8 

 July 9 

 July 11 

 Aug. 3 



...do 



July 17 

 Aug. 12 

 July 29 

 July 28 

 Aug. 12 

 Aug. 8 

 Aug. 5 

 Aug. 16 

 Aug. 8 

 Aug. 16 

 Aug. 27 

 Aug. 23 

 Aug. 24 

 Aug. 20 

 Aug. 27 

 Aug. 20 

 Aug. 27 

 Aug. 22 

 Sept. 8 

 Aug. 27 

 Sept. 9 

 Sept. 1 

 Aug. 29 

 Aug. 29 

 Sept. 15 

 Sept. 9 

 Sept. 8 

 Sept. 20 



Sept'. '24' 

 Oct. 7 

 Oct. 22 

 Oct. 4 

 Oct. 16 

 Oct. 30 



Produc- 

 tive 

 period. 



Days. 

 25 

 31 

 23 

 28 

 20 

 20 

 24 

 32 

 27 

 29 

 35 

 26 

 19 

 23 

 51 

 10 

 6 

 40 

 40 

 46 

 51 

 37 



52 

 28 

 39 

 46 

 45 

 24 

 37 

 25 

 28 

 20 

 41 

 29 

 20 

 42 

 23 

 19 

 32 

 27 

 21 

 31 

 20 

 28 

 38 

 33 

 33 

 27 

 31 

 23 

 29 

 23 

 35 

 21 

 34 

 25 

 20 

 32 

 33 

 26 

 21 

 23 

 22 

 23 

 31 

 41 

 20 

 29 

 37 



27. 63+ 



Noinber 

 of young. 



Average 

 young 

 per day 

 of pro- 

 ductive 

 period. 



61. 97+ 



2.9+ 

 2. .5+ 

 3.3+ 

 3.1+ 

 2.5- 

 3 



3.4+ 

 2.6- 

 2.9+ 

 2.3+ 

 1.8 

 2.8 

 3 + 

 3 



1 + 

 3.5 

 2.6+ 

 1.2+ 

 1 + 

 .6+ 

 1 + 

 1.5+ 



.9+ 

 1.1+ 



2 + 

 1.6+ 

 1.1+ 



3 + 

 2 + 

 3.2 

 2.8+ 

 4 

 1.7+ 



2 + 

 2.6 

 1.3+ 



3 + 

 3.4+ 

 2.4+ 

 3.1+ 

 3 



2 + 



3.3+ 



2 + 



1.3+ 



2 + 



2.1+ 



2.1+ 



2.2+ 



2.4+ 



2.6- 



2.9+ 



2 - 



3.3+ 



1.6+ 



3.2 



3.4 



2.1+ 



2.4+ 



3.3+ 



3 



3 



2.3+ 



2.2+ 



2.3+ 



1.6+ 



8 + 



1.9- 



1.1+ 



2.5+ 



Length 



of life 



after last 



young. 



Days. 



13 



14 







8 







14 



21 



15 



27 



11 



31 



27 



1 



13 

 38 

 2 

 

 51 

 24-25 

 28 

 31 

 41 



11.5+ 



Total 



length of 



life. 



