73 
In the notes I read to you last session on Galigus and 
Lepeoptheirus, T mentioned that Mr. Henry Goodsir, in the 
Edinburgh Philosophical Journal for 1842 describes the 
remarkable manner in which the ova are extended through 
the side of the ovary, but remain attached to it, until the 
final hatching of the young takes place. I am not aware 
that this manner of development of the ova has been 
noticed by anyone else, nor did I come across any instance 
of it in the dozens of living Caligi I had under examination 
last year at Granton. However, this might be owing to the 
fact that I was giving attention more particularly to those 
sausage shaped bodies, which I have shown to be spermatic 
capsules, and so may have overlooked any ova which may 
have been hatching out. 
Late in September this year, however, I obtained a few 
living caligi from living fish, and the ovaries of one of these 
happened just to be hatching out. Fortunately this par- 
ticular specimen lived several days in a small narrow bottle 
of sea water, and I was able to see the ova in several 
instances break through the walls of the ovary, remaining, 
however, attached to it in the manner shown in the diagram, 
and about a dozen young caligi hatched out which lived for 
about a week, and some of these I shall show you under 
the microscope. They bear a marked resemblance to the 
young of Cyclops of which I exhibit drawings showing its 
appearance at various ages. 
It may be that my specimens have arrived at a more 
advanced stage than those from which Mr. Goodsir made 
his drawing, for a comparison between the sketch of my 
specimen which I exhibit along with a copy of Mr. Goodsir’s 
will make it plain to you that mine is much more developed. 
He describes his as having three pairs of legs, which have 
long spines at their extremities, and two pairs of spines at 
the posterior extremity of the body. My specimens have 
three pairs of limbs : the first pair, is jointed and terminated 
