496 Pancreas in Embryos of the Pig, Rabbit, Cat, and Man 
vein. Its duct (D. pane. v.) extends through the ventral mesentery to 
enter the bile duct near its intestinal orifice. 
The dorsal pancreas (Panc. d.) ventral to the portal vein, lies in the 
dorsal mesentery and extends through it into the mesogastrium. Its duct 
(D. pane. d.) passes through the dorsal mesentery to enter the duodenum 
a little beyond the common bile duct. The dorsal pancreas has developed 
a short process (2) which we can compare with the subdivision x in the 
pig (Fig. 2). That such a process develops in the cat we know from 
the description and figures of Heuer, 06. He says (p. 107): 
SVD. pane.d.. 
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us A s 
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Fic. 4. Reconstruction from a cat embryo of 10.7 mm. (H. EH. C. 474). * 55 
diams. The lettering is the same as in Fig. 2. 
Lying in the plica duodeno-jejunalis between the caput and cauda is a 
narrow strip of glandular tissue, the shape of which varies considerably. 
It is characteristic in the cat, having been found in every adult examined. 
It occurs in two forms, either as a bridge connecting the caput and cauda, 
or as an arm or spur, that is an outgrowth from the caput or cauda, but not 
joining the two limbs. The former type is by far the most frequent. Of 
25 cases examined, the bridge type was presented in 25, the arm or spur 
type in four, an incomplete formation in five, while in one case, a young 
animal, it was lacking altogether. 
Gage, 78, Schirmer, 93, and Heuer, 06, have shown that both ducts 
normally exist in the adult, and have the same relation as found in the 
embryo,—the duct of the dorsal pancreas enters the intestine beyond the 
orifice of the common bile duct. 
a 
