28 



MORPHOLOGY OF THE 



the median line, and its total length of jejunum and ileum 

 was only 104 mm. 



Embryos 65| and 66 mm. resembled each other very 

 closely. In each case a short ascending colon was present, 

 and the length of jejunum and ileum was almost identical, 

 119 and 120 mm. respectively. The allantois in both was 

 fully distended. 



In spite of the close resemblance existing between these 

 two embryos, the coils of intestine differed materially from 

 each other, as can be seen on referring to Figs. 15 and 16, but 

 it should also be added that the arrangement of their in- 

 testinal coils resembled each other more closely than any of 

 the previous embryos, and for this reason it seemed to me to 

 be worth while to publish them, although there is, to say the 

 least, very little similarity between them. 



The following description applies to Figs. 15 and 16. 

 Fig. 15 is an embryo of 65| mm., and Fig. 16 an embryo of 

 66 mm. (enlarged 5.3 diameters). These plates represent the 

 arrangement of the intestinal coils as seen after the removal 

 of the ventral lobes of the liver. The different coils are 

 numbered, beginning with the termination of the ileum and 

 ending with the beginning of the jejunum. The superficial 

 coils are marked with a letter. 



In the embryo cat the individual coils of jejunum and 

 ileum have no definite arrangement, and it seems to me that 

 it would be even going too far to state that the ileum was 

 more apt to be situated on the right side of the body than 

 on the left, although in many -cases it is found there. 



Intestinal Coils in the Adult Cat. 



The thoracic aorta of five cats was injected with seventy 

 per cent alcohol, and they were allowed to remain in fluid 

 of the same strength for a week, and then their abdominal 

 cavities were opened. The intestines had been sufficiently 

 fixed by the alcohol to allow a satisfactory study of the coils 

 of jejunum and ileum. 



As soon as the abdomen was opened, an accurate draw- 



