80 ARKIV FÖR ZOOLOGI. BAND 1. 



Further down towards the posterior end of the ventricle 

 the glandular layer seems to become thicker. The pits are 

 deeper and in consequence hereof the parts of the glandular 

 tubules vertical against the surface of the ventricle, seem 

 to be longer and more plainly visible. It is, however, pos- 

 sible that this difference between different parts of the ven- 

 tricle is due to different degrees of contraction. The shal- 

 lower and wider pits in the honeycombed surface with the 

 tubules in their deeper parts extending more or less paral- 

 lel to the surface, then correspond with a stronger dilatation 

 of the ventricle, and, on the other hand, the deeper pits with 

 more vertical tubules sit in a more contracted region of the 

 wall of the ventricle. It is evident that the reticular struc- 

 ture formed by the connective tissue of the mucosa is an 

 adaptive characteristic that enables the ventricle to be highly 

 dilated without its being exposed to a dangerous strain. It is 

 namely of great protective importance for the epithelial and 

 glandular layer when the ventricle is dilated, as otherwise 

 these might most easily be pulled asunder. 



How far down towards the sphincter the fundus glands ex- 

 tend cannot with certainty be decided on this material. 

 About 5 cm. from the sphincter I ha ve found only fundus 

 glands. It seems, however, certain that in a distance of 

 about 2 cm. the fundus glands have ceased and their place 

 has become occupied by pylorus glands. The glands in this 

 region are wider and although most of the cellules are de- 

 stroyed the difference can be easily seen and it may be concluded 

 that these glands have had »sehr helle Zellen mit wand- 

 ständigen Kem», as Oppel* says in describing the pylorus 

 glands of Pseuäopus apus. This is said concerning the cel- 

 lules of the inner ends of these glands. The outer parts of 

 the tubules are invested by cylindrical cellules which are 

 more resistent and therefore better preserved. The pylorus 

 glands of Varanus seem, however, to be more complicated 

 than those of Pseudojias as figured by Oppel (1. c. p. 127) and 

 are evidently branched. 



The glands of the pyloric tract between the sphincter 

 and the pyloric valve seem to resemble these glands, but in 

 this part the state of preservation is still worse, so that it 

 does not allow any definitive judgment. It is, however, clear 



Lehrb. vergl. niikr. Anat. Der Magen. Jena 18%. 



