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MESSRS. J. TOMES AND C. DE MORGAN ON THE 
Fiff. 7. An excentric Haversian system, illustrating the arrangement of the laminae. 
Fig. 8. a. Lamination of bone, as it appears under a low power, h. The same highly 
magnified, showing the lines of osteal cells and the intermediate transpa- 
rent tissue. 
PLATE Vn. 
Fig. 9. Transverse section of a stag’s antler, after shedding, showing the transparent 
tissue which lines the Haversian canals. 
Fig. 10. Section showing the circumferential laminae, perforated by an Haversian 
system. 
Fig. 11. Section showing the orifices of the canaliculi, with their parietes. 
Fig. 12. Sections from rickety bone. a. Consolidated lacunae, h. Lacunal cells, 
from which no canaliculi have proceeded. 
Fig. 13. Section showing circumferential laminte, with elongated canals passing 
amongst the lacunae and canaliculi. 
Fig. 14. Section of fossil bone, from the Wealden, supposed to be Pterodactyle, in 
which the nuclei have been preserved by fossilization. 
Fio-. 15. Ossified lacunal cells, from the spongy portion of a bone of an old subject. 
Fig 16 Section from the petrous portion of a temporal bone of an adult, a. Lacunal 
cells, containing lacunae and canaliculi. h. Intercellular granular tissue, 
similar to that found in bone developed in cartilage. 
Fig. 17. Section showing ossified articular cartilage, a. Lacuna developed from a 
cartilage cell. h. Lines of granules. 
Fig. 18. Section from an incus in a subject aged seventy-five, showing osteal and 
lacunal cells on the surface. 
PLATE VIII. 
Fig 19. Longitudinal section of ossifying temporary cartilage, showing— u. Ossified 
intercolumnar tissue, h. Lacunal cells, c. Granular cells in process of 
conversion into lacunte. d. Lacunal cells imbedded in ossified inteico- 
lumnar tissue, without conversion into lacimee. 
Fig. 20. Transverse section of ossifying cartilage from femur of a child, fourteen days 
old. a. Intercolumnar tissue, h. Lacunal cell. c. Similar cell, with 
granular cell in process of conversion into a lacuna. 
Fig. 21. Se\-tion from femur of same subject, taken a little way below the ossifying 
cartilage. 
Fig. 22. A longitudinal section of new bone, a little further advanced than in fig. 19. 
a. A detached lacunal cell, showing the three parts ot which these bodies 
are composed. 
