488 NOTES. 



rare cases it remains permanently, projecting freely : usually ".{ 

 disappears at an early period, as in Anthropoid Apes. 



178 (ii. 284). On the Number of Vertebrae in different Mam- 

 mala, cf. Cuvier, "Le9ons d'Anatomie Comparee." 2nd edition, 

 tome i., 1835, p. 177. 



179 (ii. 293). On the earlier Skull-theory of Goethe and Oken, 

 cf. Virchow, " Goethe as a Naturalist " (" Goethe als Natur- 

 forscher," 1861, p. 103). 



180 (ii 295.). Karl Gegenbaur, "The Head-skeleton of 

 Selachii" ("Das Kopfskelet der Selachier"). As the foundation 

 of a study of the head-skeleton of Vertebrates (1 872). 



181 (ii. 301). Karl Gegenbaur, " On the Archipterygium." 

 "Jenaische Zeitschrift fur Naturwissenschaft," vol. vii. 1873, 

 p. 131. 



182 (ii. 304). Gegenbaur, " Researches into the Comparative 

 Anatomy of Vertebrates " (" Untersuchungen zur Vergleichen- 

 den Anatomie der Wirbelthiere "). Part I. Carpus and Tarsus 

 (1864). Part II. The shoulder girdle of Vertebrates. Pectoral 

 tins of Fishes (1866). 



183 (ii. 305). Charles Martins, " Nouvelle comparaison des 

 membres pelviens et thoraciques chez 1'homme et chez les 

 mammiferes." " Memoires de 1'Acad. de Montpellier," vol. iii. 

 1857. 



184 (ii. 308). Ossification. Not all bones of the human body 

 are first formed of cartilage. Cf. Gegenbaur, " On Primary and 

 Secondary Bone-formation, with special reference to the Pri- 

 mordial Skull Theory." " Jenaisch. Zeitschrift fur Natur- 

 wissenschaft," 1867, vol. iii. p. 54. 



185 (ii. 308). Johannes Miiller, "Comparative Anatomy of 

 Myxinoides." " Transactions of the Berlin Academy," 1834-1842. 



18(3 (ii. 314). The Homology of the Primitive Intestine and 

 the two primary germ-layers is the postulate for morphological 

 comparison of the various Metazoa-tribes. 



187 (ii. 322). In the Evolution of the Intestine, Amphibia and 

 Ganoids have, by heredity, retained the original Craniota-forrn 

 more accurately than have Selachii and Osseous Fishes (Tdeoslci). 



