I2 SPECIAL REFERENCES. 
form a small bony plate. By continued growth, this 
plate extends, until it meets with neighbouring bones. 
What, in the adult skull, appear as sutures are, in the 
embryo, filled by a vascular connective tissue, in which 
numerous osteoblasts are present. The growth of this 
tissue ceases, when the bones have become complete, 
and only the sutures remain; and even these in old 
skulls may become almost obliterated. 
SPECIAL REFERENCES. 
PIZZOZERO:. “ Neue Untersuchungen ueber d. Bau 
o 
des Knochenmarkes bei den Vogeln.” 
Aten fj. mikr. Aviat., 1800, TV) xx. 
SCHAFER, E. A.: “ Quain’s Elements of Anatomy.” 
Volt, part 1,“ General: Anatomy or 
Histology.” London, 1891. 
S@RICHT, ©:v. d.:“ Recherches sur la structure fonda= 
mentale du tissu osseaux.” 
Arch. de Biologié, 1889, T. ix. 
STRICHT, O. v. d.: “Recherches sur la cartilage hyalin.” 
Arch, de Biologié, 1887, T. vii. 
THIN, G.: “ On the Structure of Hyaline Cartilage.” 
Proc. Royal Soc., 1885. 
