THE LOBOSA 



not associated with disease. Endamoeba undulans, Castellani (40), 

 exhibits a peculiar amoeboid form, which occasionally protrudes a 

 single pseudopodium. There is practically no distinction between 

 the ectoplasm and endoplasm. The presence of a peculiar undulat- 

 ing membrane running round one end of the body suggests that 

 the species may have different affinities to the ordinary species of 

 Endamoeba. 25-30 //,. Ceylon. Endamoeba iurai, Ijima (12), has 

 been described from the human intestines in Japan. 



The species described under the name Parainoeba hominis by 

 Craig (41) was found in the faeces of patients suffering from 



N 



Fio. 16. 



KiK/'Uiioeba histolytica, Schaudinn. A, B, two specimens from a case of dysentery in a cat ; 

 c, blood corpuscles being digested ; N, nucleus. (After Jiirgens.) C, specimen from human 

 intestine with resting nucleus (N) and a single non-contractile vacuole. D, specimen giving 

 rise by gemmation to a spore ; eh, chromatin of nucleus in the form of scattered chromidia ; 

 sp, protoplasm of spore containing some chromidia. (C and D after Lesage.) 



severe diarrhoea in the Philippine Islands, associated with E. 

 histolytica and other Protozoa. There appear to be three phases in 

 the life - history : (1) an amoeboid phase, 15-25 p.; (2) a resting 

 cystic stage, 15-20 //,; (3) a biflagellate phase, 3-15/z. Notwith- 

 standing the general resemblance in its life-history to that of the 

 marine Paramoeba eilhardi, it is difficult to believe that this species 

 is rightly placed in the same genus. 



Endamoeba blattae is often found in the rectum of the common 

 cockroach. In form it is similar to Amoeba Umax, but it seldom 

 pushes out a single pseudopodium and has remarkably clear proto- 

 plasm. It may be as much as 80 //, in diameter. Other species 

 probably belonging to the same genus are found in the intestines 

 .of mice and in the rectum of the frog. 



