260 APPENDIX- 



In the foregoing Table the embryo-sac of the higher Phanero- 

 gamia is taken as representing the "albuminous body" of the 

 Coniferae or rather its wall, for its cellular contents would 

 answer more to the endosperm. Hofmeister farther considers 

 this body to represent the prothallium of the Cryptogamia. 



The view here adopted is distinct from both, regarding the 

 following as homologous plants : 



1. The spore and the ovule. 



2. The prothallium and the "albuminous body." 



3. The Archegonium, the Corpusculum, and the Embryo-sac. 

 In this view the endosperm is unrepresented in the Coniferse 



and Cryptogamia, and the prothallium and " albuminous body" 

 in the Angiospermeae. 



But the principal point, in which the relations represented in 

 this table differ from those advocated in the present work, is 

 the identification of the alternation of the Mosses with that of 

 the Ferns as has been explained before at some length. 



To make the points now referred to more intelligible I have 

 represented in a tabular form the relations here adopted, break- 

 ing up Dr. Sanderson's Table into three, for the sake of con- 

 venience, but keeping to his general arrangement, as much as 

 the necessary changes allow. In these tables, as well as in the 

 one just given, the male structures are printed in italics. 



