{'fraction_non_alphanumeric': 0.021166752710376872, 'fraction_numerical': 0.005678884873515746, 'mean_word_length': 4.963076923076923, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
THE CYTOLOGY OF DIGESTION AND ABSORPTION IN THE CRAB PARATELPHUSA (OZIOTELPHUSA)

Introduction. IN a previous communication, an account of some investigations into the physiology of digestion and absorption in Paratelphusa (Oziotdphusa) hydrodromus (Herbst) has been given (Reddy, 1937). The present paper deals with the cytology of the epithelial cells of the digestive tubules, midgut and its cmca. The author is not aware of any published paper which deals with the distribution and behaviour of the cytoplasmic inclusions within the epithelial cells during the process of digestion and absorption in Paratelphusa (Oziotdphusa) hydrodromus (Herbst). Material and Method. The crabs were killed after varying periods of starvation and different intervals of feeding and material was fixed in all cases in Bonin, Gilson and Flemming. In the case of the digestive gland 30 per cent. alcohol containing 5 per cent. corrosive sublimate was also used as a fixative. Animals fed on olive oil stained with Sudan I n were fixed in Fleming without acetic acid, while animals fed on ferrum oxydatum saccharatum, were fixed in 95 per cent. alcohol containing 5 per cent. ammonium sulphide and the presence of iron in the absorptive cells was shown by the Prussian Blue reaction. Living material was stained with neutral red in order to make out the origin of the secretory granules in the cells. The subsequent transformation into fully formed secretory granules was also followed. Mann Kopsch method was found to be most satisfactory in the study of the Golgi apparatus while Flemming without acetic acid gave the best results for mitochondria. Observations. (1) Digestive tubutes.--The digestive gland consisting of a right and a left half occupies the entire anterior region of the eephalothorax. Each half comprises a large number of blindly ending tubules. The lumina of these tubules are continuous with three main ducts corresponding to the