130 Proceedings of Boijal Society of Edinburgh. [sess. 
Mur ex. 
Loligo. 
Water, 
88-557 
86-154 
Solids, ...... 
11-443 
13-846 
r Organic matter, 
9-623 
10-645 
1 Salts, ..... 
1-820 
3-201 
One liimdred volumes of the blood of each of these Molluscs con- 
tained the following volumes of the three gases, the volumes being 
reduced to 0° C. and 760 mm. : — 
Mur ex. 
Loligo. I 
I. 
II. 
I. 
II. 
Oxygen, .... 
14-21 
13-98 
13-46 
13-22 
Carbonic anhydride, . 
30-16 
29-76 
30-02 
32-31 
Nitrogen, .... 
1-82 
1-65 
1-46 
1-23 
The oxygen and carbonic anhydride in the blood of Invertebrates 
do not obey the law of Dalton in regard to the absorption of a 
mixture of gases by a simple fluid. In this respect there is a close 
analogy to the blood of the Vertehrata. 
Such is the present state of our knowledge concerning the 
chemistry, &c., of the blood of the Inveriebrata. 
