The Morphology of Cosmobia 377 



point, aud, owing undoubtedly to tlie chance of gi'avitation or of some 

 temporary mechanical condition, such as a fold of the gut, the first of 

 tlie fecal matter selected the branch belonging to component B as its 

 functional outlet. B's intestine and colon therefore became filled and 

 distended from this point on, while those of A, although perfectly normal, 

 remained empty. In one feature there is a secondary deformation, and 



21.6 cm. 



27.0 cm 



29.3 cm. 



25.0 om. 



Fig. 4. Alimentary canal of tlie Baldwin Syuote, Teras III. The measure- 

 ments given were taken between tlie points designated with an X. 



that is, the entire intestine of A, beyond the bifurcation, has pinclied 

 itself off from the rest, leaving a short stub at the place where the 

 intestines have become individual. It seems probable that this cutting 

 off occurred subsequent to the adoption of B's canal for functional 

 activity, although there was probably some direct connection between the 

 two events. Perhaps the pinching off occurred as the result of inactivity, 

 or perhaps, which is more likely, it was the final result of a restriction 



