Annals of medical history . Fig. 15. Outline sketch showing normal appear-ance of the two vertebrae, based on Diplodocus andApatosaurus. A=chevron. This process in thepathological specimen has been shoved far ventral-ward and involved in the tumor-like mass. t» t. Fig. 16. This figure will show the possibilities inthe microscopic study of fossil bones. The drawing,300 diameters, shows the osseous lacunae, with shortcanaliculi arranged around a large vascular opening,thus simulating an Haversian system. The lacunaeof dinosaur bones are much smaller than are thelacunae in other extinct forms. Th
Annals of medical history . Fig. 15. Outline sketch showing normal appear-ance of the two vertebrae, based on Diplodocus andApatosaurus. A=chevron. This process in thepathological specimen has been shoved far ventral-ward and involved in the tumor-like mass. t» t. Fig. 16. This figure will show the possibilities inthe microscopic study of fossil bones. The drawing,300 diameters, shows the osseous lacunae, with shortcanaliculi arranged around a large vascular opening,thus simulating an Haversian system. The lacunaeof dinosaur bones are much smaller than are thelacunae in other extinct forms. The dark areasare due to the staining of iron with which thebones are infiltrated. The section was taken fromthe periphery of the specimen shown in Fig. 14. The bones exhibiting these interestingindications of Mesozoic pathology are thecaudal vertebrae of a huge land reptile, oneof the sauropodous dinosaurs, possibly Apa-tosaurus. The position of these bones in thebody of the animal is indicated by thearrow in Fig. 17. The sauropodous dino-saurs were the most gigantic of all landvertebrates, although not nearly so largeas some of the modern whales. The largestof these reptiles attained a length of nearly70 feet and an estimated weight of 39 head was
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Keywords: ., bookauthorp, bookcentury1900, bookdecade1910, booksubjectmedicine
