448 Royal Society : — 



" For the sake of comparison, I divided the skull of another em- 

 bryo of the same age into two halves by a vertical median section, 

 washed out the brain and examined the preparation while it lay im- 

 mersed in weak spirit of wine in a shallow glass capsule. The 

 occipital bone had the same funnel-shape as in the former case. As 

 development advances, the funnel-like form is gradually lost, whilst, 

 on the other hand, the bone appears more deepened or tubular the 

 earlier the embryo to which it belongs. The same is true of 

 quadrupeds. 



"In the beautiful figure of the embryo-skull, given in KoUiker's 

 ' Microscopische Anatomie,' B. II. taf. 3. fig. 2, the downward pro- 

 longation of the occipital bone appears much less, but whether less 

 than it ought to be I cannot venture to say, as I happen to have no 

 specimen of that age (one month older than the one I have given) 

 with which to compare the figure. 



Fig. 1. 



" The early form of the occipital bone I have here described be- 

 comes easily intelHgible when we remember that the shape of the 

 skull is regulated by that of the brain ; and that as the latter is at 

 first greatly elongated, and its ganglia imperfectly covered, the cra- 

 nium must then also have a correspondingly elongated form. 



" 2. On the Antrum Pylori. 

 " I have now for some time directed my attention to the determi- 

 nation of the true form of the stomach, and have become more and 

 more convinced that the antrum pylori of the older anatomists 

 (' Pfortnerhohle ' of the Germans) is really a special compartment 

 of the general cavity. I have had occasion to make numerous ex- 

 aminations of the stomach in the bodies of middle-aged women who 



