No. i.] 



THE LESSER PERITONEAL CAVITY. 



177 



and the aboral side of the liver, now lies on the aboral side of 

 the stomach and on the ventral side of the liver. It has also 

 shifted its position to the right of the median line. A model of 

 these parts, from the ten-millimetre embryo, simply rotated, 

 to throw the stomach away from the mouth, gives the condition 

 of things as they exist in the embryo thirteen millimetres long. 

 The intestine is composed of two loops, one from the stomach, 

 extending into the pelvis, and the other at the caecum, extending 

 to the stomach, and on the left side of the first loop. The 

 second loop is shown in Fig. 10. 



The rapid growth of the large intestine has thrown the caecum 

 as high as the stomach, but to the right of it. The fold of 



FlG. II. Section through the foramen of Winslow and the lobus Spigelii of a 

 dog 13.5 millimetres long. Enlarged 36 times, //..aorta; .S., stomach; P., portal 

 vein; [/., umbilical vein; 1, 2, and 3, descending, ascending, and descending por- 

 tions of the intestine; L.P.C., lesser peritoneal cavity; L. S., lobus Spigelii; 0., 

 omental cavity. 



omentum, coming from the dorsal side of the stomach, passes 

 over the large intestine, as shown in the figure. The general 

 shape of the lesser peritoneal cavity is shown in Fig. 1 1. The 



