252 
ANATOMY OF REGIONS 
not oppose the organic nature of these infectious elements. 
We have further shown that the bovine variola, v. vaccina, 
cannot be considered as a genuine or original form of variola, and 
that in all probability it takes its origin either in v. humana, or, 
at present, in humanised vaccine, and finally I have called atten¬ 
tion to the fact that under certain conditions the foetus is accessi¬ 
ble to intra-uterine vaccination by timely vaccination of the 
mother, and that theoretically and practically proven fact is well 
worthy of further consideration and proof. 
[The above hurriedly-made translation of the greater part of 
this very excellent contribution to pathology will, I hope, be 
found very interesting to the readers of the Review. I say hur¬ 
riedly made, for those who know the work the translator has on 
his hands, must know that everything lie at present does is 
forced; so I beg pardon for any ambiguity of expression, and 
make myself responsible for all mistakes except those of the un¬ 
fortunate “ chap” who sometimes rules in the printing office.—B.] 
ANATOMY OF REGIONS. 
Translated from Pencil and Toussaint, Precis de Chirurgie Veterin- 
aire } by A. Liautard, M.D., V.S. 
Continued from Page 207 . 
MEMBRANA NICTITANS. 
The functions of this little apparatus, its position in front of 
the eye in the cases where this organ is drawn back in the orbit 
by the muscular contractions, made it to be called the third eye¬ 
lid. Indeed, it fills the part of an eyelid, having, like them, for 
duty, to protect the essential organ of vision and to remove from 
it foreign substances which may accidentally come in contact with 
it; the membrana nictitans is only visible outside, when this last 
function is to take place, or when an external cause threatens the 
