SKELETONS, SHELTERS AND SPECIAL DEFENCES 671 



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70. Lafon, M., "Sur la composition du tegument des Crustaces," C. R. Soc. 

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71. Lafon, M., "Sur la structure et la composition chimique du tegument de la 

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72. Lafon, M., "Nouvelles recherches biochimiques et physiologiques sur le 

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12a. Lane, C. E. and Tierney, J. Q., "Hydrodynamics and respiration in 

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73. Lorch, I. J., "The distribution of alkaline phosphatase in the skull of the 

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74. Lorch, I. J., "The distribution of alkaline phosphatase in relation to 

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75. Lowenstam, H. A. /'Factors affecting the aragonite-calcite ratios in carbo- 

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76. Lowndes, A. G., "Densities of the embryonic stages of sea-urchins," 

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77. McCance, R. A. and Masters, M., "The chemical composition and the 

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78. McCance, R. A. and Shackleton, L. R. B., "The metallic constituents of 

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79. MacGinitie, G. E. and MacGinitie, N., Natural History of Marine 

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80. Manigault, P., "Recherches sur le calcaire chez les Mollusques," Ann. 

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81. Marks, M. H., Bear, R. S. and Blake, C. H., "X-ray diffraction evidence 

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82. Maxwell, B. E., "The distribution of vitamin B 12 -active substances in some 

 marine invertebrates of British Columbia," J. Fish. Res. Bd Can., 9, 164 

 (1952). 



83. Menon, M. D., "The use of bones, other than otoliths, in determining the 

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84. Moore, H. B., "The biology oiLittorina littorea. 1 . Growth of the shell and 

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85. Morgulis, S. and Janecek, E., "Studies on the chemical composition of 

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86. Mortensen, T., A monograph of the Echinoidea. 2 (1) and 3 (2) (Copen- 

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87. Needham, J., Chemical Embryology, Vol. 3 (Cambridge Univ. Press, 1931). 



88. Neiland, K. A. and Scheer, B. T., "The influence of fasting and of sinus 

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89. Nicol, E. A. T., "The feeding mechanism, formation of tube, and physiol- 

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90. Nicol, J. A. C, "Responses of Branchiomma vesiculosum to photic stimula- 

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