TABLE OF CONTEXTS. XI 



Page. 



Loss of work in triangular muscle, . . . . , 183 



Law of arrangement of fibres in pectoral muscle, in birds 



and man, ......... 186 



Temporal muscle and latissimus dorsi in man, , . 191 



e. Deltoidal muscles, . . . . . . . . 192 



Trapezius muscle in man, . , . . . . 193 



Pectoral muscle in squirrel, . . . . . . 194 



f. Quadrilateral muscles, . . , , . . . 194 



g. Sphincter muscles, . . . . , , . . 1 96 



Relation between tangential and radial strains, , . 199 



Iris in man, 200 



Orbicularis palpebrarum in man, . . , , . 201 



Discussion of the muscles of the mouth in man, . , 204 



h. Muscular fibres forming curved surfaces, . , . . 209 

 *. Ellipsoidal muscles, . . . . . . , 210 



Tension of fibres in any azimuth determined by the 



indicatrix, . . . . . , . . , 215 



Lagrange's theorem, . . . . . . . 218 



Obliquus externus in man, . . . . . , 219 



Obliquus internus in man, . , . . . , ^^' 



Vertical and transverse tension due to abdominal muscles, 223-4 



Mean curvature of abdomen in parturient women, . . 22-j 



Curvature of diaphragm, . . . . . . 231 



k. Muscular skew surfaces, . , . . . . 232 



/. Teleological postulate, 238 



Illustrations of postulate 



1. Latissimus dorsi in man, . . . , . 245 



2. Latissimus dorsi in lion and tiger, . , , 249 



3. Latissimus dorsi in albatross, . . . , 256 



4. Hamstring muscles in lion and tiger, . , , 257 

 Axis of maximum instability — ■ 



5. Wing of the albatross, 283 



6. „ wood pigeon, 294 



7. „ heron, ...... 295 



8. „ macaw, 297 



9. pheasant, 299 



Axis of minimum stability — 



10. Wing of the albatross, ...... 309 



11. ,, wood pigeon, . . . . , 312 



12. „ heron, . . , . , . 313 



13. ,, macaw, . . . . . . 3 14 



14. „ pheasant, 315 



