495 
A much later shifting changes the position of the caecum and thus 
the ascending colon is formed. 
The loops of the intestine, in their early development, are about 
equally distributed on the lateral sides of the body and not until the 
coils return to the peritoneal cavity is the upper portion of the jejunum 
completely shifted to the left side, as shown in specimen LXXIX. 
It is easy to see that in a stage slightly in advance of this one 
the caecum will be liberated and thrown to the right side of the 
peritoneal cavity. A further discussion of the figure given is unneces- 
sary as the reader can compare it more profitably with those given in 
His’ Archiv. 
While it is fairly easy to understand why the intestine in its 
development moves out into the cord it is more difficult to understand 
why it is returned to the peritoneal cavity. I have emphasized 
sufficiently in previous communications!) the great amount of shifting 
which takes place from the head towards the tail on the ventral side 
of the embryo during its development. As the abdominal organs are 
receding they are gradually pushed upon the pelvis, so much so that 
in embryos 24 mm long the lower margin of the stomach is opposite 
the vertebre destined to form the sacrum and the small and large 
intestine are nearly altogether in the cord. From this time onward 
the lower part of the body grows more rapidly and it appears as if 
the peritoneal cavity becomes too great for the organs it already 
contains and the intestine is sucked back to fill the space. That such 
is the case is indicated in embryo LXXIX. The lower border of the 
stomach is now fully five segments higher than in embryos somewhat 
younger. Once back in the peritoneal cavity the loops, which collect- 
ively lay in the sagittal plane of the cord, are arranged at right 
angles to the long axis of the body and the antero-posterior colon 
becomes the transverse. 
W. H. FLOWER 7. 
Der am 1. Juli d. J. in London verstorbene Sir WırLıam HENRY 
FLOWER war geboren am 30. November 1831 in Stratford; er studirte 
in Dublin und London Medicin und machte als Regimentsarzt den 
Krimfeldzug mit. 1857 wurde er Mitglied des Royal College of Surgeons 
in London, 1859 Assistent und Lehrer der Anatomie am Middlessex 
Hospital daselbst. 1860 erhielt er die Stelle als Conservator des 
Hunter’schen Museums im R. College of Surgeons, an dem er 1870 
1) Matz, Journal of Morphology, Vol. 5, 12 and 14. 
