92 



Later information from Doctor Hemmeter states that the disap- 

 pearance of the parasites from the stools coincided with improve- 

 ment in the child's condition. 



Clinical diagnosis. — The fresh unstained stools should be exam- 

 ined microscopically; or the diluted stool may be stained with 

 methylene blue, by which nearly all objects , become promptly 

 stained, except Lamhlia, which remains grayish white (Roos, 1893) 

 for several hours. 



Treatment. — Attempts to expel Lamblia have not always met 

 with marked success. Among the drugs used are male fern, sul- 

 phate of quinine, naphthol, calomel, hydrochloric acid, and arsenic. 

 Grassi appears to have had success with calcined magnesia. 



FiQ. 16.~"Lamilia inlestinalis" of man. 

 (After Bensen, 1908, flg. 5.) 



Fig. 17.— Copulation cyst of 

 "Lamblia inUsiinalis" of 

 man. (After Bensen, 1908, 

 fig. 6.) 



The division of Lamblia duodenalis into separate species. — 

 Bensen (1908) has recently divided Lamhlia duodenalis s. 1. into 

 three species: L. "intestinalis," L. muris, and L. cuniculi. His 

 preliminary paper seems to offer fairly convincing data for the cor- 

 rectness of his interpretation, but it may be well to await the pub- 

 lication of his more complete paper, in which he promises fuller 

 details, before the species are definitely accepted. Several nomen- 

 clatural points will come up for consideration in this connection. 



Lamblia intestinalis, which Bensen accepts as name for the species 

 (fig. 16) occurring in man, can not be accepted, as this name is based 

 on Cercomonas intestinalis Lambl, 1859, which is invalidated by 



