60 University of California Publications in Zoology [ VoL - 19 



TABLE 24 



The Geotropism op Sagitta in Bright Diffuse Daylight and in Darkness, and 



Under Varying Conditions of Temperature. 



Salinity 33 to 34 «/ 00 . 



Number of observations 



observed V IV III II I Total % % tribution 



11:15 a.m.-3:15 p.m., darkness, temperature 16°-17°C 



1. 147 28 15 1 9 47 12 17 58 2.7 



3:15-3:20 p.m., diffuse light, temperature 16°-17°C 



2. 18 5.5 5.5 89 2 100 1.4 



3:21-8:45 p.m., darkness, temperature 17°-18°C 



3. 80 50 18 10 6 16 7 100 3.8 

 Left in dark overnight; following records obtained on second 



day of captivity 

 7:45-8:25 a.m., darkness, temperature 16°-17°C 



4. 33 61 15 9 15 3 100 4.0 



8:26-9:10 a.m., diffuse light, temperature 16°-17°C 



5. 38 2.5 8 2.5 18 69 5 80 1.6 



9:11-9:30 a.m., darkness, temperature 16°-17°C 



6. 20 55 20 5 20 2 100 3.8 

 During time of lines 7-10, the lower one-fifth was at temperature of 7°-8°C 



9:42-10:20 a.m., darknesS ( 



7. 44 40 5 7 25 23 5 40 60 2.9 



10:21-10:40 a.m., diffuse light 



8. 35 6 14 69 11 4 100 2.2 



10:41-10:52 a.m., darkness 



9. 17 41 30 18 11 2 100 4.1 



10:53-11:07 a.m., diffuse light 



10. 17 11 18 53 18 2 5 5 3.2 



Ice jacket removed 

 11:08-11:20 a.m., diffuse light, temperature of lower one-fifth, 8%°-10%°C 



11. 18 6 17 11 33 33 2 100 3.6 

 11:30 a.m., diffuse light, temperature of lower one-fifth is 12%°C 



12. 8 12 38 50 1 100 1.7 

 11:30 a.m.-12:45 p.m., diffuse light, temperature of lower one-fifth goes up to 16°C 



13. 25 4 4 12 80 3 100 1.6 



12:45 P.M., lower one-fifth immersed in ice water 

 12:55-1:40 p.m., diffuse light, temperature of lower one-fifth 7°-9°C 



14. 23 22 4 39 35 3 100 1.9 

 1:40-2:00 p.m., diffuse light; 2:00-2:15 p.m., darkness, ice jacket removed 



2:15-2:30 p.m., darkness, temperature of lower one-fifth 10°-11°C 



15. 25 52 24 20 4 3 100 3 4.2 



2:30 p.m., lower three-fifths in ice, darkness 

 2:50 p.m., darkness since 2:30 p.m., temperature of lower three-fifths 8 o -10 o C 



16. 8 100 1 100 3.9 

 2:50-3:25 p.m., diffuse light, temperature of lower three fifths 7°-9°C 



17. 32 22 44 34 4 75 3.2 



3:25-8:25 p.m., darkness, ice jacket removed 

 5:30-8:20 p.m., temperature of whole column 15°-16°C 



18. 26 70 15 4 4 7 3 100 4.3 



