SCHEME OF GROUPS, 



AND DETAILS OF SUCH AS HAVE YET TO BE 

 COMPLETED. 



STRUCTURES CONCERNED IN THE PRE- 

 SERVATION OF THE INDIVIDUAL, OR 

 TO ITS ADVANTAGE. 



A. ENDOSKELETON. 



B. FLEXIBLE BONDS OF UNION AND SUPPORT, 



C. MUSCULAR AND ALLIED SYSTEMS, 



D. NERVOUS SYSTEM. 



E. ORGANS OF SPECIAL SENSE, 



F. INTEGUMENTARY SYSTEM AND EXOSKELE- 



TON. 



G. LUMINOUS AND ELECTRIC ORGANS, 



H. ORGANS FOR LOCOMOTION AND FLOATING 

 BORING. FIXATION. (Including those of Spores, 

 Seeds, and Fruits.) 



Organs concerned in Nutrition. 



I. RESERVE STORES OF FOOD, AND CALORIFIC 

 MATTER (not for Embryo). 



J. ORGANS FOR DIRECT ABSORPTION AND PRE- 

 PARATION OF FOOD. 



K. NUTRIENT FLUIDS, AND ORGANS THAT PRE- 

 PARE THEM. (Including "Ductless Glands.") 



L. CIRCULATORY SYSTEM AND BODY-CAVITY 

 (=C(ELOM). 



6 



