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literature concerning the structure of the latter In. Gongylus, as in 
Lacerta, three ribs are fixed to the Prosternum. To the xiphisternum, 
too three ribs are fixed (Horrmann*), Parker ®), FürBRINGER *). With 
the exception of this difference, which had no importance for the 
study of my material, the relations agree with those of Lacerta. 
The embryo Gongylus ocellatus F. and G. agree in their stage 
of development with the embryo S. of Lacerta. They contain a 
blastematic sternal formation, which is clearly unconnected with the 
formation of the coracoideum. 
Fig. 5. Gongylus ocell. F. obliquely frontal. 
Thanks to the oblique direction of sectioning it was possible to 
draw the abovesaid relation between sternum and coracoid in diagr. 
5, which represents part of such an oblique section. Also by the 
peculiar direction of sectioning, in this section the sternum is situated 
dorsally to the coracoideum. Between the two we find a small layer 
of loose mesenchym. In the diaphysis humeri we find already some 
praechondrium. 
A following stage is represented by the embryos Gong. ocell. A 
and B. They are similar to the embryos E and F of lacerta. The 
1) C. K. Horrmann in Bronn’s Klassen u. Ordn. des Thierreichs. Reptilien. 
2) W. K. PARKER. Monogr. on the Struct a. developm. of Should. g. and Stern. 
Ray Soc. 1868. 
3) M. FürBRINGER. Jenaische Zeitschr. Bd. 34, 1900. 
