1890-91.] Dr Griffiths on the Blood of the Invertebrata. 291 
(c) Blood of Palinurus vulgaris. 
100 volumes of the blood of this animal gave the following 
results 
I. 
IT. 
III. 
IV. 
Oxygen, 
14-62 
14 71 
14-29 
14-76 
Carbonic anhydride, 
30-00 
29-62 
28-92 
2979 
Nitrogen, ..... 
1-82 
1-60 
1-20 
1-34 
(d) Blood of Homarus vulgaris. 
100 volumes of the blood obtained from several large lobsters 
yielded the following results : — 
I. 
II. 
III. 
Oxygen, 
14-99 
14-81 
14-85 
Carbonic anhydride, 
31-11 
28-84 
29-26 
Nitrogen, 
1-76 
1-82 
1-85 
(e) Blood of Octopus vulgaris. 
1 00 volumes of the blood yielded the following results : — 
I. 
II. 
III. 
Oxygen, ....... 
13-33 
13-28 
13-65 
Carbonic anhydride, 
30-23 
31-29 
31-22 
Nitrogen, . 
1-45 
1-30 
1-29 
(/) Blood of Acherontia atropos. 
100 volumes of the blood of the larvae of this moth yielded the 
following results : — 
