414 PROCEEDINGS OF THE CANADIAN INSTITUTE. 
ing at rest a question of long standing, although his statements were 
contradicted by Krukenberg! and confirmed by Nussbaum’. Cajetan’, 
a pupil of the latter, studied and described the pancreas in Anguilla 
vulgaris, Esox lucius, Trutta fario, Perca fluviatilis and Cobitis 
barbatula, and tests his results by digestive experiments in several 
cases. 
There are no pyloric appendages in the cat-fish. In searching the 
intestines microscropically a pancreas also is not to be found. I could 
find no organ in Amiuwrus as that described by Brandt and Ratzeburg 
as occurring in Silurus. On the other hand, in endeavoring to find 
the duct described in the last named fish by Cuvier, I discovered 
one which but little answered to it, but which as I found afterwards 
is the duct of the true pancreas. 
This pancreatic duct runs almost parallel to the ductus choledochus 
and above it. The pancreatic duct is always the paler of the two, as 
the other takes more or less the color of bile. Half way between 
the intestine and the liver it divides into two or three branches, 
which run above the arched portion of the ductus choledochus into 
the liver substance along with the cystic ducts on both the right and. 
left side of the middle line. 
In the larger channel cat-tishes the duct is large enough to admit 
the insertion of a canula for the purposes of injection, and by this. 
means the branching of the duct can be easily perceived. The finer 
tubules, z. ¢., those of the gland proper, cannot be injected. 
If the interlobular branches of the portal vein be injected with some 
material which will fill them to the exclusion of the finer branches, 
and if a section of liver thus injected be made, in such a section we 
can at once see the distribution of the gland tubules of the pancreas. 
They are found to be arranged some circularly, some obliquely and 
some longitudinally about the interlobular vein, the arrangement 
being so distinct as at once to mark them off from the surrounding 
hepatic tissue. The cellular elements of these acini are light colored 
when compared to the hepatic cells, and take a lighter or a darker 
stain than those, according to the staining fluid used. 
Fig. 11 gives a view of such a section. It is there observed, as is 
usual in other sections, that the gall ducts are to be found outside of 
the pancreatic tubules, some of which are cut across. 
1 Kukne’s Physiol. Untersuch. Bd. II. p. 385. 2 Loe. cit. 8 Loc. cit. 
