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Contents 



1 Rock-Boring Organisms, bv C. M. Yonge 1 



2 Boring Sponges as Controlling Factors in the Formation 



and Maintenance of Coral Reefs, bv Thomas F. Goreau 

 and WiLLARD D. Hartman 25 



3 Demineralization Mechanism of Boring Gastropods, bv 



VIelbourne R. Carriker, David B. Scott, and Garland 



N. Martin, Jr. 55 



4 Dental Hard Tissue Destruction with Special Reference 



to Idiopathic Erosions, by Reidar F. Sognnaes 91 



5 Attrition of the Hypsodont (Sheep's) Tooth, by C. R. 



Barnicoat 155 



6 Microstructural Changes in Early Dental Caries, by 



Arthur I. Darling 171 



7 Ultrastructural and Chemical Observations on Dental 



Caries, bv Erling Johansen 187 



8 Physical Chemistrv of Enamel Dissolution, by John A. 



Gray and Marion D. Francis 213 



9 Factors Influencing the Initiation, Transmission, and Inhi- 



bition of Dental Caries, by Paul H. Keyes and Harold 



V. Jordan 261 



10 Eftect of Hibernation on Tooth Structure and Dental 



Caries, by William V. Mayer and Sol Bernick 285 



11 Dento- Alveolar Resorption in Periodontal Disorders, by 



Ingjald Reichborn-Kjennerud 297 



12 Bone Remodeling during Dental Eruption and Shedding, 



bv Surindar N. Bhaskar 321 



13 The Deciduous Nature of Deer Antlers, bv Richard J. 



Goss ' " 339 



14 Internal Remodeling of Compact Bone, by Franklin C. 



McLean and Robert E. Rowland 371 



xiii 





