272 Comparative Physiology of the Salivary Glands 



ghiretti, F. (1950). Enzima della ghiandole salivari posteriori dei cefalo- 



podi. Boll. Soc. ital. Biol, sper., 26, 776-780. 

 hadidian, z. (1956). In The venoms. American Assoc. Adv. Science, 



Washington. 

 haycroft, j. b. (1884). Uber die Einwirkung eines Secretes des officin- 



ellen Blutegels auf die Gerinnbarkeit des Blutes. Arch. exp. Path. 



Pharmak., 18, 209-217. 

 jaques, r. (1956). In The venoms. American Assoc. Adv. Science, Wash- 

 ington. 

 jensen, h. and u. westphal (1956). In The venoms. American Assoc. Adv. 



Science, Washington. 

 lesperon, l. (1937). Recherches cytologiques et experimentales sur la 



secretion de la soie. Arch. Zool. exper. et gen., 79, 1-156. 

 lester, h. m. o. and L. lloyd (1928). Notes on the process of digestion in 



the tsetse flies. Bull. Ent. Res., 19, 39-60. 

 roeder, k. d. (1953). Insect physiology. Riley, New York. 

 walshe, b. M. (1947). Feeding mechanisms in chironomus larvae. Nature, 



160, 474-475- 

 wigglesworth, v. b. (1927). Digestion in the cockroach. II. Digestion of 



carbohydrates. Biochem. J., 21, 797-811. 



— (1929). Digestion in the tsetse fly: a study of structure and function. 



Parasitology, 21, 288-321. 



— (1959). Insect physiology. Methuen, London. 



zeller, e. a. (1948). Enzymes of snake venoms and their biological 

 significance. Advanc. Enzymol., 8, 459-496. 



