326 



PLASMODROMATA AND SARCODINA 



where it caused a severe dysenteric condition in the lower bowel and sometimes 

 liver abscess. Barlow notes that it may be necessary to place this species in 

 a genus distinct from Craigia. 



Morphology. — The amoeba measures some 12-30 microns, the average being 

 20 microns. The endoplasm is granular and contains a nucleus, but no 

 accessory nuclear body. 



Life-History. — The cysts measure 18 microns, and the flagellates, of which 

 there are forty or more in a cyst, about 3-5 microns. These flagellates do not 

 divide, but pass directly into the amoeba stage. 



Pathogenicity. — It causes severe dysenteric lesions and liver abscess in man. 



Fig. 64. — Diagram of the Life-Cycles of Craigia hominis Craig. 

 (After Craig, from the American Journal of Medical Sciences.) 



ORDER II. THECAMCEBIDA. 

 Synonyms. — Filosa Leidy, 1879; Testacea. 



Definition. — Amoebae with a shell composed of different materials cemented 

 on a chitinous base. Through the single opening in this shell pseudopodia, 

 which maybe lobose or branched, but which never anastomose, project. 



Family Gromiid^ Eimer and Fickert, 1899. 



Definition. — Thecamoebida with simple shell, composed for the most part 

 of chitin, without calcareous deposits and single-chambered. 



Genus Chlamydophrys Ehrenberg. 

 Type Species. — Chlamydophrys enchelys Ehrenberg. 



Chlamydophrys enchelys Ehrenberg. 



Synonym. — Chlamydophrys stercorea Cienkowsky, 1876; Leydenia gemmipara 

 Schaudinn, 1896. 



This rhizopod (Fig. 66), which is believed to be parasitic in man in one stage 

 of its life-history, can be found growing in human faeces, as well as in those 

 of the cow, the rabbit, the mouse, and the lizard. It is oval in form, enclosed 

 by a shell, except anteriorly, where the filiform pseudopodia project. The 

 body of the parasite is divisible into an anterior portion, in which lie the 



