Neca Va RITE EP E 
Miscellaneous. 351 
bones are clean, so that I can examine them, I shall offer a few more 
observations upon the osteology of this remarkable animal, for the 
complete skeleton of which the Canterbury Museum is indebted to 
the members of the Philosophical Institute, without whose pecuniary 
assistance I should have been unable to secure it for the Provincial 
collections.— Proc. Phil. Institute of Canterbury, New Zealand, May 5, 
1869. 
On-the Heat evolved by Invertebrate Animals, especially Insects. 
[AURICE GIRARD. 
M. Girard's memoir commences with a very interesting historical 
account of the numerous investigations that have been made upon 
this subject, in which he dwells especially upon the researches of 
withstanding the scientific precision with which they were conducted. 
. Girard's own researches have been made by means of very va- 
he made a modification necessary for his experiments. One of the 
bulbs presents a deep interior cavity, so that the volume of air con- 
tained in the concentric zone is equal to that of the volume of air in 
the other bulb. The contracted orifice is closed by a cork furnished 
with a tube, through which air enters and escapes freely. The in- 
sect to be experimented on is introduced into thjs cavity with the 
I of M. Becquerel, done good service in the study of 
animal heat. Lastly, M. Girard has used the thermo-electrie piles 
bismuth a ich, since their invention by Melloni 
Without going into the details of M. Girard's experiments or in- 
Adult insects, even when sleeping or very weak, never present a 
diminution of the temperature of the surface of their body below 
the surrounding temperature. The larve and pups of insects with 
et they always present an elevation of temperature above 
that of the surrounding air, or at least a temperature equal to that 
of the la This is not always the case in insects with a complete 
rature of the surrounding air, which shows that the evolution of 
heat by the respiratory combustion may be insufficient to com- 
