SUBJECT INDEX 



Sedentary life, osteoporosis, 433 

 Sediment 



coral reef, 47 

 erosion of corals, 46 

 Sedimentary rock, 1 

 Selective demineralization, enamel 



caries, 175 

 Selenium deficiency, paradontal dis- 

 ease, 161 

 Semiquantitative analysis, microradio- 



graphs, 467 

 Senile bone matrix, 432 

 Senile osteoporosis, sex hormones, 427 

 Sequestering agents, 55, 638 



sec also Chelation 

 Sequestrene, 81 

 Serrated edges, crystals, 75 

 Serum citric acid, 390 

 Setous thoracic appendages, barnacles, 



7 

 Severe osteoporosis 

 case studies, 413 

 trabecular bone, 400 

 Sex factor, osteoporosis, 418 

 Sex hormones 



antler shedding, 353, 354 

 osteoporosis, 387 

 senile osteoporosis, 427 

 Sex influence, antler shedding, 353 

 Shadowed replicas, 65 

 Shedding of antlers, see Antler shed- 

 ding 

 Shedding mechanism, 92, 340 



denervated antlers, 360 

 Shedding of teeth, 91, 92, 95, 97, 321 

 bone remodeling, 321, 331, 332 

 summary, 336 

 Sheep 



calcium requirements, 161 

 incisor teeth, 155 

 jaw defects, 157 

 phosphorus requirements, 161 

 Sheep's teeth 



attrition, see Attrition of sheep's 



teeth 

 chemical composition, 163 

 excessive wear, 165 

 fluorine content, 165 



757 



hardness, 157, 167 

 proteolysis, 94 

 pulp canal, 156 

 spectrographic analyses, 161 

 Shell boring 



ABO gland, 65, 75 

 algae, 55 

 bacteria, 55 

 fungi, 55 



rate of penetration, 59 

 snails, 55, 58, 59 

 Shell dissolution, 69 

 ABO homogenates, 64 

 chemical means, 55 

 Shell drilling, see Shell boring 

 Shell etching, 31, 65, 66, 67, 86 

 ABO homogenate, 65 

 ABO secretion, 62, 83, 75 

 ABO-substrate preparations, 63 

 crystal outlines, 73 

 electron microscopy, 71, 75 

 excised ABO gland, 62 

 pattern, 75 



pseudo replicas, 73, 77, 81 

 replicas, 70, 72 

 variability, 68, 85 

 Shell of gastropod prey, 86 



artificial etching, see Shell etching 

 bore holes, see Bore holes 

 chemical agents, effect, 75 

 demineralization, 79 

 gloss, 60 

 Shell morphology, ABO activity, 69 

 Shell protection, periostracum, 20 

 Shell substrates, 62, 85 

 Shell valves 



abrasive action, 11 

 agents of boring, 8 

 articulating processes, 10 

 erosion, 9, l7 

 mechanical action, 8 

 rocking, 11 

 rows of teeth, 10 

 Shortened lower jaw, sheep, 159 

 Shrinking osteocytes, 400 

 Shunt activity, hexose monophosphate, 



579 

 Sialic acid, dental plaque, 657 



