4io 



THE ANIMAL PARASITES OF MAN 



another for about 18 mm. One then bends forward, runs as far as 

 the oesophagus, bends here again and runs backward to end at the 

 point of its first bending. The other branch at first runs straight 

 backward and then bends forward, but before reaching the point of 

 the first bend of the anterior tube bends backward again, forms 

 again a loop and ends at the level of the anus. The tubes consist in 



FIG. 290. Loa loa : the 

 anterior end of the male, mag- 

 nified. (After R. Blanchard.) 



FIG. 291. Loa loa : anterior 

 portion of the female as far as 

 vulva. (After Loos.) 



FIG. 292. Loa loa in situ. 

 Natural size. (After Fiille- 

 born and Rodenwaldt.) 



FIG. 293. Loa loa: male 

 on the left, female on the 

 right. X2. (After Looss.) 



the main of the uterus, then a club-shaped swelling, the receptaculum 

 semmis, then the oviduct 2 mm. long, and finally the ovary. 



Unsegmented eggs measure 32 //, by 17 ^ in the morula stage 

 40 /* by 25 /*, and when containing embryos 50 //, by 25 /*. The 

 vitelline "shell" of the egg is, according to most authors, stretched by 

 the embryo and becomes the sheath of the hatched larva. While 



