HOW DO STARFISHES OPEN OYSTERS ? 283 



2. Venus 3-9 cm. long, 3-2 cm. broad. 



6.15 p.m., loaded with 900 grams. 



6.20 „ open nearly 2 mm. 



6.30 „ open 4 mm. 



7.5 „ open 6 mm. 



8.7 „ open 5-5 mm. (because a lamp was brought near). 



9.0 „ open 6 mm. 



9.30 „ open 6 mm. 



6.15 a.m. the next morning, open 6 mm. : then set free. 



3. Venus 4 cm. long, 3-3 cm. broad. 

 7.0 a.m., loaded with 900 grams. 



Load increased to 1250 grams. 



7.38 a.m., load increased to 1700 grams. 

 7.46 ,, load increased to 2000 grams. 

 8.10 „ open 7 mm. 

 8.15 „ adductor muscles ruptured. 



4. Venus 3-6 cm. Ion", 3 cm. broad. 



8.19 a.m., loaded with 900 grams. 

 8.40 „ open 3 mm. : then set free. 



5. Venus 34 cm. long, 2-8 cm. broad. 



8.40 a.m., loaded with 900 grams. 

 8,56 „ open 1-5 mm. 

 9.2 „ open 2 mm. 

 12.27 p.m., open 2-5 mm. 



Load increased to 1000 grams. 



2.0 p.m., open 2-5 mm. 

 6.45 „ open 2-5 mm. 



Load increased to 1400 grams. 



7.15 p.m., open 3 mm. 



7.45 „ open over 3 mm. 



9.50 „ open 4 mm. : then set free. 



