( 53 ) 
TABLE IV. 
0 , per hour and 
weight individual 0 3 per hour and K.G. 
ICrenilabrus occilatus 10 0,365 36,5 
J „ pavo 180 5,13 29,4 
With a proportion of 1 :18 in weight the 0 , consumption is in 
ratio of 1,24 :1. With Scy Ilium a ratio of 1 :18,5 agreed with a 
diminution of 1,7 :1. Eliminating in the experiments with the, Cre- 
nilabrus the influence of age, we could not help introducing other 
influences (movements, differences of species). 
6. In connection with the above-mentioned experiments of Vernon 
I also investigated the. O, consumption in a few individuals of 
|Octopus vulgaris and of Echinus. Here it was my intention to 
compare two cold-blooded animals, one having a very active meta¬ 
bolism and a very rapid growth x ), the other consuming very little 
0 3 . In broad daylight the three Octopus individuals just caught, 
were quiet, their respiration was regular, after the experiment the 
animals were entirely normal. The smallest Octopus remained during 
the experimental period in a corner of the bottle and kept very 
quiet, the larger ones now and then put out a tentacle. 
Octopus vulgaris 
Weight 
in gr. 
HO 
370 
45 
TABLE 
I 0.52 
3.0t 
6.1 
0.106 
I 0.034 
Cc0 9 per hour 
and K.G. 
27.36 
17 
2.3 
1.70 
I may as well remark here that also Rhizostoma must have a 
very rapid growth, as animals of 2 or 3 K.G. may occur and the 
lease of life of these pelagic animals is not long. Carmarina, on the 
other hand, in which the difference in V 3 consumption is much less 
dependent on the size, not nearly reaches such a size (at most 
± 100 gr.) and has not such a rapid growth. 
The figures of my tables, like those of Vernon, show therefore 
b Dr. Lo Bianco was so kind as to give me information about this. 
