V«i,. II, Pt. I] VAN DENBURGH— GALAPAGOS TORTOISES 205 



The head, neck and limbs 291 



Variation in proportions 291 



color 291 



Osteological 292 



Key to the Galapagoan Races 293 



Description of each Race 295 



The gaddle-backed Races 295 



1. Testudo abingdoni; Abingdon 295 



2. phantastica; Narborough 299 



3. becki; North Albemarle 302 



4. ephippium ; Duncan 305 



5. hoodensis; Hood 312 



6. elephantopus ; Charles 316 



The Intermediate Races 319 



7. Testudo darwini; James 319 



8. Chatham ensis ; Chatham 323 



9. microphyes; Albemarle 3^ 



10. giintheri; S. E. Albemarle 335 



11. vicina; South Albemarle 344 



12. wallacei; Jervis 351 



The Dome-shaped Races 354 



13. Testudo porteri; Indefatigable 354 



14. species ? ; Cowley Mountain, Albemarle 362 

 The Unknown Race 365 



15. Testudo species ?; Barrington 365 



General Conclusions 366 



Bibliography 369 



