BODY TEMPERATURE OF EARTHWORM. 



263 



of the observations recorded were made by means of mercurial 

 thermometers, though some were made by thermocouples with 

 galvanometers. In reading the statements of the different 

 investigators one is left with the feeling that with the more 

 improved appliances of the present day one ought to be able 

 to make observations which would be more satisfactory than 

 those published. The following table summarizes the results 

 of a number of investigators, and is compiled from data quoted 

 by Milne-Edwards. 1 



Animal. Authority. 



Fishes less than iC. above surrounding water Milne-Edwards 



Frog o.32-2.44 Czermak 



Frog . .o.o -o.575 Becquerel 



Frog o.04 Dutrochet 



Toad o.2 



Frog o.7 -o-3 Dumeril 



Proteus i.2S Rudolphi 



Proteus 2.6 -5.6 Czermak 



Crayfish.. . . .6.o Rudolphi 



Maia sq o.3 -o.g Valentin 



Limax o.33 o.5O Spallanzani 



Snail 2.o Hunter 



Snail i.i Martine 



Snail o.g Becquerel 



Snail i.5 -2.o Schnetzler 



Aplysia o.i -o.8 Valentin 



Octopus o.2 -o.6 



Eledone o.p 



Annelids o.s6-o.85 Hunter 



Lumbricus i.n-i.39 



Holothuria o.2 -o.6 Valentin 



Ophiurian o-3 



Asterias ru o.6 



Sea Urchin o-4 -o.s 



Medusa Pelagia o.2 -i.o 



Medusa Cassiopea o.3 



Actinians o.2 -o-5 



In the table it will be noted that the temperatures determined 

 for the different animals show, for the most part, rather small 

 variations from that of the surrounding water. In a few cases 

 the variation is quite considerable, and appears to make desirable 

 a reexamination of the facts. This is especially true in view of 



1 Milne-Edwards, "Lecons sur la Physiologic et L'Anatomie Comparee de 

 L'Homme et des Animaux," T. VIII., Paris, 1863. 



