190 
ON CATARACT IN 
first division took place within the canal , and both branches as 
they issued were true compound nerves. 
The Coccygeal or Caudal Nerves .—There are four other pairs 
of nerves proceeding from these chords, and which escape from 
the four first vertebrae of the tail. They are also compound 
nerves of sensation and voluntary motion : they anastomose with 
each other, and keep up the chain of nervous intercommunication; 
but they have no connexion with the great organic which has 
here ceased to exist. They likewise divide into a superior and 
inferior branch ; the superior connected with the erector, and 
the inferior with the depressor muscles of the tail, and both of 
them being also subcutaneous nerves. 
And so ends our anatomical description of the spinal marrow,— 
brief, dry, and somewhat unsatisfactory; but we should here¬ 
after have had much repetition, if I had at present more fully 
traced the course of the different nerves. We are now prepared 
to return to the commencement of the spinal chord, and enter 
into the consideration of its lateral column ; but this deserves a 
separate lecture. 
ON CATARACT IN THE EYE OF THE HORSE. 
By Mr. W. C. Spooner, V.S., Winchester. 
In the last January number of The Veterinarian there 
appears a very interesting paper on a most important subject, 
viz. the formation of cataract; and I think it behoves every one 
who has any thing to offer that can possibly throw light on the 
subject, to lay it before his professional brethren; for it must be 
extremely desirable, that the jarring opinions of veterinarians 
should be in a measure reconciled ; and those strange contrarie¬ 
ties and differences of opinion that a horse trial too frequently 
elicits, should be as much as possible avoided. However, the 
greatest errors, and the most unpleasant differences, often act as 
incentives to inquiry, and stepping-stones to knowledge; and the 
trial in question, which has furnished subjects for Mr. Cart¬ 
wright’s remarks, has not been deficient in affording these 
desiderata. 
The facts brought forward by Mr. Cartwright and by Mr. 
Perry in the last number, I think, sets one question at rest, viz. 
that cataract may and does occur independently oj previous active 
injlarnmation; but although (this being the case) the opinions 
expressed by several veterinarians on the trial must consequently 
