NOTES. 485 



Axolotl into an Amblystoma. Cf. on this subject especially 

 August Weismann, in " Zeitsch. fur wissensch. Zoologie," vol. 

 xxv., Sup., pp. 297-334 



153 (ii. 131). The Leaf-frog of Martinique (Hi/lodes mar- 

 tinicensis) loses its gills on the seventh day, its tail and yelk-sao 

 on the eighth day of egg-life. Oil the ninth or tenth day after 

 fertilization the complete frog emerges from the egg. Bavay, 

 "Sur 1'Hylodes Martinicensis et ses Metamorphoses." "Journal, 

 de Zool. par Grevais," vol. ii. 1873, p. 13. 



154 (ii. 133). " Homo diluvii testis" = Andrias Scheuchzeri. 

 " Sad bone of an ancient evil-doer ; Soften, stone, the heart of 

 the new children of evil " (Diaconus Miller). Quenstedt. 

 " Formerly and Now " (" Sonst und Jetzt," 1856, p. 239). 



155 (ii. 133). The Amnion-structure of the three higher 

 Vertebrate-classes, wanting in all lower Vertebrates, has no 

 connection with the similar, but independently acquired Amniou- 

 structure (analogous, but not homologous) of higher Articu- 

 lated Animals (Arthropod' i). 



156 (ii. 138). The former existence of a Protamnion, the 

 common parent-form of all Amniota, is undoubtedly shown by 

 the Comparative Anatomy and Ontogeny of Reptiles, Birds, and 

 Mammals. No fossil remains of such a Protamnion have, how- 

 ever, yet been discovered. They must be sought in the Permian 

 or Carboniferous formation. 



157 (ii. 147). The former organisation of the Promammalia 

 may be hypothetically reconstructed from the Comparative 

 Anatomy of the Salamander, Lizards, and Beaked Animals 

 (Ornitlwrhynchus) . 



158 (ii. 153). The Didelphic ancestors of Man may have been 

 externally very different from all known Poached Animals (Mar- 

 supialia), but possessed all the essential internal characters of 

 Marsupialia. 



159 (ii. 163). The phylogenetic of the Semi-apes, as the 

 primaeval placental parent-group, is not influenced by our ignor- 

 ance of any fossil Prosimiae, for it is never safe to estimate 

 palaeontological facts as negative, but only as positive. 



