ABNORMAL CONDITIONS IN ANIMALS. 3 



14. Three Spanish Nuts united by their pericarps : union seems 



to have taken place during the later stages of develop- 

 ment, as it is not complete, and the adjacent portions of 

 the pericarps are flattened. A section has been made 

 through the nuts. Presented by Prof. Flower, 1871. 



c. Union of seeds (Synspermy). 



15. Two Bean-seeds united by their cotyledons near their hila, 



which are distinct. The testa is continuous over the two 

 seeds. Hunterian. 



d. Union of embryos (Synophy). 



16. Two seedling Orange-plants attached by their cotyledons; 



they were produced from a single seed. There are four 

 cotyledons, but the two between the embryos are smaller 

 and are closely adherent to one another. 



Presented by B. T. Lowne, Esq., 1871. 



17. Three seedling Orange-plants growing from a single seed. 



The cotyledons are united between the embryos. The 

 third embryo is very much smaller than the other two. 



" It occurs, not unfrequently, in the Orange and Hazel that more 

 than one embryo is developed in a single testa ; and this condition 

 is very common in the Coniferse, Cycas, the Onion, and the Mis 

 seltoe. Now and then a union of these embryos takes place." 

 (Lindley's ' Introduction to Botany.') 



Presented by B. T. Lowne, Esq., 1871. 



SERIES II. 



ABNORMAL CONDITIONS AFFECTING THE AXIS 

 IN ANIMALS. 



Class I. VARIATION*. 



a. Situs mutatus (transposition of the viscera). 



This is the only class of phenomena affecting the whole axis 

 which can be regarded as a variation. In the earliest stages 



* For remarks on the nature of Classes and Subclasses see the In- 

 troduction. 



B2 



