958 The American Naturalist. [November, 
munity, since the resistance of the toad is greater than that of the frog. 
In such a case, the immunity of the salamander would be due to the 
presence in its blood of a substance which would be an antidote or 
would neutralize the effects of curare. To verify this hypothesis, they 
innoculated a frog with the blood of a salamander, and obtained the 
following results : 
1. The mixture of the blood of a salamander and curare in the proper 
proportions does not affect the frog. 
2. The blood of the salamander provokes a physiological reaction an- 
tagonistic to curare. 
These results show that the blood of the salamander contains a sub- 
stance anti-toxic to curare; this substance exercises a protective action 
not only over the animal which secretes it, but also over the frog, in 
which it produces a true physiological reaction against curare. 
The experiments of MM.C. Phisalix and Contejean were made in the 
laboratory of comparative physiology which is in charge of M. Chau- 
veau, of the Museum of Natural History of Paris. (Revue Scienti- 
fique, 1st Sept., 1894.) 
List of Ophidia found near Vincennes, Indiana.— I do not 
offer the following as a complete list of the snakes to be found in the 
neighborhood of Vincennes, but have included only such as I have 
taken myself. The region was once a very paradise for the herpetolo- 
gist, but in the past few years many large swamps have been drained 
and cleared and animals once common are now rare, if not wholly ex- 
terminated. Still a more careful search would doubtless lengthen my 
list considerably. 
The Aneistrodon contortriz, Sistrurus catenatus and Crotalus horridus 
‘were certainly once abundant, and are still reported as numerous, 
though I have never succeeded in finding a specimen of any one of 
them, and therefore do not include them in my list. 
1. Carphophis amoena (Say), found under overhanging rocks. 
2. Farancia abaeura (Holb.), swamps. 
3. Bascanium constrictor, numerous. 
4. Diadophis punctatus (Linn.) found in rotten logs; rare. 
5. Liopeltis vernalis (DeK.), abundant. 
6. Cyclophis aestivus ( Linn.), abundant. 
7. Storeria dekayi Holb., among high grass in swamps. 
8. Storeria oceipitomaculata (Storer), stony ground. 
— iis 
