XIV 



CHAPTER 

 CHAPTER 

 CHAPTER 

 CHAPTER 



III. 



IV. 



V. 



VI. 



CHAPTER VII 



CONTENTS. 



Vertebrae and Ribs 



Spinal Nerves 



Variation in Arthropoda 



Ch.etopoda, Hirudinea and Cestoda 



Branchial openings of Chordata and struc- 

 tures IN CONNEXION WITH THEM . 



1. Ascidians. 2. Cyclostonii. 3. Cervical Fistula? and Super- 

 numerary Auricles in Mammals 



CHAPTER VIII. Mamjle 



CHAPTER IX. Teeth 



Preliminary. Primates. Canidaa. Felidae. Viverrida?. Muste 

 lida?. Pinnipedia. Marsupialia. Selacbii. Radula? of Buccimun 



CHAPTER X. Teeth — Recapitulation 



CHAPTER XL Miscellaneous Examples .... 



Scales. Kidneys; Renal Arteries; Ureters. Tentacles and Eyes 

 of Mollusca. Eyes of Insects. Wings of Insects. Horns of 

 Sheep, Goats and Deer. Perforations of shell of Haliotis. 



CHAPTER XII. Colour-Markings 



Ocellar Markings. Simultaneity of Colour-Variation in Parts 

 repeated in Linear Series (Larva? of Lepidoptera : Chitonida?) 



CHAPTER XIII. Minor Symmetries: Digits . . . . 

 Cat. Pp. 313—324. 



Man and Apes. Pp. 324—360. 



Increase in number of digits, p. 324. 



Cases of Polydactylism associated with change of Symmetry. A. 

 Digits in one Successive Series, p. 326. B. Digits in two 

 homologous groups forming "Double-hands," p. 331. Complex 

 cases, p. 338. 



Polydactylism not associated with chanye of Symmetry, p. 344. (1) 

 A. Single extra digit external to minimus, p. 345. (1) B. 

 Single extra digit in other positions, p. 349. (2) Duplication of 

 single digits, p. 349. (3) Combinations of the foregoing, p. 352. 

 (4) Irregular examples, p. 353. 



Reduction in number of phalanges, p. 355. Syndactylism, p. 356. 

 Absence of digits and representation of two digits by one, p. 358. 

 Horse, pp. 360 — 373. Extra digits on separate metacarpal or meta- 

 tarsal, p. 361. More than one digit borne by metacarpal III., 

 p. 369. Intermediate cases, p. 371. 

 Artiodactyla, pp. 373 — 390. Polydactylism in Pecora, p. 373. Poly- 

 dactylism in Pig, p. 381. Syndactylism in Artiodactyla, p. 383. 



Birds, pp. 390—395. 



Possibly Continuous numerical Variation in digits : miscellaneous 

 examples, pp. 395 — 398 (Chalcides. Cistudo. Eissa. Erinaceus. 

 Elephas.) Inheritance of Digital Variation. Association of 

 Digital Variation with other forms of Abnormality. 



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265 



274 



288 



311 



