396 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



It is perhaps better to state that, in absence of food, 

 and in captivity, a lobster weighing approximately 200 

 grams uses np 0*176 gram of oxygen daily, which would 

 correspond approximately to 0'160 gram of carbohydrate 

 or 019 gram of protein. 



Experiment II. 



Lobster No. 2.— Weight, 240-248 grams. Volume 

 of sea-water in carboy = 46'86 litres daily. Duration of 

 experiment, August llth-September 13th, 1912 = 33 days. 



Oxygen appearing 

 in Carbon- dioxide. 



Date. Time 

 Interval, 



h. m. 



August 11-12 25 15 



12-13 18 



13-14 22 50 



14-15 23 20 



15-16 23 30 



16-17 23 50 



17-18 23 35 



18-19 23 30 



19-20 23 50 



20-21 23 25 



21-22 23 15 



22-23 23 55 



Oxygen used up. 



Milligrams Total m.g. 

 per litre, in Carboy. 



4-92 

 3-33 

 3-73 

 3-35 

 3-22 

 4-28 

 3-58 

 3-50 

 3-20 

 2-58 

 2-57 

 2-89 



230 

 156 

 175 

 157 

 151 

 200 

 168 

 164 

 150 

 121 

 121 

 135 



Milligrams 

 per litre. 



6-4 



3-5 



4-5 



3-2 



2-6 



3-8 



4-2 



3-2 



3-2 



2-2 



1-9 



1-9 



Total 



m.g. 



300 



164 



211 



150 



122 



178 



197 



150 



150 



103 



89 



89 



This animal was not offered food, having been intended 

 originally as a control to the first. The experiment was 

 interrupted for about 1^ hours at this stage for weighing, 

 the animal by an error not having been weighed at the 



beginning. Weight = 240 

 Experiment re-commenced. 



grams on August 23rd. 



Date. Time 



Interval, 

 h. m. 



August 23-24 22 40 



„ 24-25 23 10 



„ 25-26 24 05 



„ 26-27 23 20 



„ 27-28 23 55 



„ 28-29 23 45 



„ 29-30 23 35 



„ 30-31 23 45 



Aug. 3l-Sep. 1 23 50 



Oxygen used up. 



Milligrams Total m.g. 

 per litre, in Carboy. 



3 03 



3 03 



Oxygen appearing 

 in Carbon-dioxide. 



2-51 

 1-76 

 205 



2 04 

 2-16 

 3-39 



3 00 



142 



142 



118 



82 



96 



96 



101 



159 



141 



Milligrams 

 per litre. 



2-2 



2-9 



2-2 



3-8 



1-6 



2-9 



2-2 



31 



2-2 



Total 

 m.g. 

 103 

 136 

 103 

 178 

 75 

 136 

 103 

 145 

 103 



