The Morphologj' of Cosmobia 



411 



of the same length. It was perfect in synimetr}^ and exhibited none of 

 the pathological characters, such as everted viscera, exencephalns, or 

 ectromelus, which are often found in monstrous embryos. The duplicity^, 

 which was externally confined to the head region, was the most pro- 

 nounced anteriorly and diminished so rapidly that at the level of the 

 shoulders the embryo appeared like that of a normal pig of the same 

 length, although the sections revealed evidences of two components to a 

 greater distance posteriorly. Thus, in the bodies of the vertebrse, there 



a 



Fig. 27a Fig. 27b 



Fig. 27. (a) Diprosopic pig embryo; Teras I. 



(b) Face of diprosopic kitten embryo, Teras XXX, almost the counterpart of 

 (a), received too late for further investigation in the present paper. To 

 obtain the full value of the components cover each half alternately with a 

 sheet of paper, taking care to place the edge along the median line. 



are found the vestiges of two notochords, side by side, as far back as 

 section 674, which is situated at about the middle of the abdomen. At 

 this point they unite in the form of a transversely placed figure-S. and 

 one or two sections beyond this the notochord is single. 



There were two distinct snouts, divaricating from each other and form- 

 ing the same angle with the median sagittal plane of the entire monster. 

 Above and between these were two separate eyeballs in a single large 

 palpebral opening, plainly the left eye of component A and the right 



