08 



DR. M. KHALIL ON THE NEMATODE 



processes from the pbaiynx. The lumen of the pharynx is 

 continuous with that of the oesophagus. 



Q'lso'pliagus. — The esophagus is long and thin. In some 

 specimens it pursues a. wa.vy course. Its posterior end is a little 

 swollen. It is '38 mm. long and '073 mm. maximum diameter. 



Text-fiyure 2. 



Leiperenia leiperi Khalil. Anterior part of tlie bod}'. 



Chyle intestine. — The intestine is ii'regularly bent in its course. 

 Near its commencement its wall is surrounded by a clear 

 refractile band, the natui'e of which is unknown. The cellular 

 wall is slightly pigmented. The rectum is a short canal : in most 

 cases its structure is obscured by the greatly distended genital 

 organs of the female. 



Excretory system. — The large excretory vesicle receives two 

 excretory ducts, one from the lower part of the body and one 

 from the head end. The excretory jDore is wide and is placed 

 •92 mm. from the cephalic end. It is placed on a raised papilla, 

 striated radially I'ound the pore. 



Nerve collar. — The nei've collar surrounds the thinnest part of 

 the oesophagus "22 mm. from the head end. 



Genital organs.— 'M.{(\e: The irregularly convoluted testis 

 reaches within -8 mm. from the head. The cement gland is 

 long, and the ejaculatoiy duct opens into the ventral aspect of the 

 cloaca. 



Female : In the mature female the genital tract is so distended 

 with embryos that the details of this system are practically 

 impossible to make out. By the help of an immature specimen 

 the general featui'es of the organs can be recognized. There 

 is only one ovary and one uterus, placed in the axis of the 

 body. The vagina is short, and opens in the posterior part of the 

 bod}^ •! ram. cephalad of the anus. 



tS^ncnles. — There are two unequal spicules and an accessoi-y 



