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99. KnaGER, P., Ergebn. Physiol. 35:538-631 (1933). Review, pH of digestive Huids, 

 lower animals. 



100. Kruger, p., and Graetz, E., Zool. ]ahrb., Abt. allg. Zool. u. Physiol. 45:463-514 

 (1928). Gastric enzymes of crayfish. 



101. KuNTARA, W., Ztschr. Physiol. Chemie 225:169-188 (1934). Lipase in Helix. 



102. Lavine, T. F., /. Cell. & Comp. Physiol. 28:183-196 (1946). Enzymic function 

 of crystalline style, clams. 



103 Lenkeit W ., Ergebn. Physiol. 35:573-631 (1933). Salivary secretion, mammals. 



104. Lesser, E. L., and Taschenberg, E. W., Ztschr. Biol. 32:443-455 (1908> 

 Digestive enzymes of earthworms. 



105. Linderstrom-Lang, K., and Duspiva, P., Nature 135:1039-1040 (1935), also 

 Ztschr. physiol. Chemie 237:131-158 (1935). Reducing agents and digestion of 

 keratin by clothes-moth. 



106. Lloyd, F. E., Papers of the Mich. Acad. Sci., Art. & Lett. 7:395-416 (1926). 

 Digestion of Spirogyra by protozoan, Vampyrella. 



107. LoTMAR, R., Bee World 15:34-36 (1934). Digestion of starch by bees. 



108. LwoFF, A. and N. Roukhelman, C. R. Acad. Sci. 183:156-158 (1926). Diges- 

 tion of peptones by Glaucoma. 



109. MacGinitie, C. E., Biol. Bull. 77:115-118 (1939), ibid. 88:107-111 (1945). 

 Feeding methods, Chaetopterus, Urechis. 



110. Mann, F. C., and Bollman, J. L., ]. Am. Med. Ass. 95:1723-1724 (1930). 

 Acidity of dog digestive fluids. 



111. Mansour, K., and Mansour-Bek, J. J., Biol. Rev. 9:363-382 (1934). Review, 

 digestion of wood by insects. 



112. Mansour, K., and Mansour-Bek, J. J., /. Exper. Biol. 11:243-256 (1934). 

 Digestion of wood by insects. 



113. Mansour-Bek, J. J., Ztschr. vergl. Physiol. 17:154-208 (1932). Proteolytic 

 enzymes, Maja. 



114. Mansour-Bek, J. J., Ztschr. vergl. Physiol. 20:343-369 (1934). Protein digestion, 

 Murex. 



115. Marshall, R. A., and Phillipson, A. T., Proc. Nutrit. Soc. 3:238-243 (1943). 

 Function of microorganisms in rumen. 



116. Mast, S. O., Biol. Bull. 75:389-394(1938). Digestion of fat in Amoeba proteus. 



117. Mast, S. O., Biol. BuU. 83:173-204(1942). Food vacuoles, pH, Amoeba. 



118. Mast, S. O., Biol. Bull. 92:31-72 (1947). Food vacuoles, Paramecium. 



119. Mast, S. O., and Bowen, W. J., BioL Bull. 87:188-222 (1944). Food vacuoles, 

 pH, several peritrichs. 



120. Mast, S. O., and Doyle, W. L., Arch. Protist. 86:155-180 (1936). Slow utiliza- 

 tion of fat by amoeba. 



121. McAnally, R. a., and Phillipson, A. T., BioL Rev. 19:41-54 (1944). Diges- 

 tion in ruminant. 



122. McDougall, E. I., Biochem. ). 43:99-109 (1948). Saliva of sheep. 



123. Metalnikow, S., Arch. Zool. Exper. Gen. 9:373-499 (1912). Food selection by 

 Protozoa. 



124. Millott, N., /. Exper. Biol. 14:405-412 (1937). Digestion in nudibranchs. 



125. Millott, N., Proc. Roy. Soc. Lond., B., 132:200-212 (1944). Nervous control 

 of secretion of protease, earthworm intestine. 



126. Nelson, T. C., /. Morph. 31:53-111 (1918). Origin and function of crystalline 

 style, lamellibranchs. 



127. NicoL, E. A. T., Tr. Roy. Soc. Edin. 56:537-598 (1930). Feeding and digestion 

 in Sabella. 



128. Nirenstein, E., Ztschr. wiss. Zool. 125:513-518 (1925). Acidity of food vacuoles, 

 ciliates (paramecium). 



129. Norris, E. R., and Mathies, J. C., Fed. Proc. 6:281 (1947). Gastric proteinase 

 of tuna. 



130. NoRTHRUP, }. H.J. Geri. Physiol. 5:263-274(1923). Differences in pH optima 

 for digestion of different proteins. 



131. Oomen, H. a. p. C., Pub. Staz. Zool. Napoli 7:215-291 (1926). Digestion in 

 holothurians. 



