258 



DR. M. lillALIL ON THE NEMATODE 



length and 'IS mm. maximum diameter, and is very slightly 

 constricted at the site of the nerve collar. The caudal end of 

 the (esophagus projects into the beginning of the chyle intestine 

 in the form of three lobes. 



Cliyle intestine. — This pursues an almost straight course. Its 

 cellular wall is pigmented in its middle portion. 



Rectum.— TlxQ intestine is sharply demarcated from the rectum. 

 The thick cellular wall of the intestine stops iibruptly. The wall 

 of the rectum is vei-y thin and chitinous. Its cavity is pear- 

 shaped, '18 mm. long and "Imm. maximiim diameter. There is 

 hardly any anal canal. The opening of the anus is marked by a 

 depression. There is a lip-like projection between the anus and 

 the vulva. 



Text-fisure 54. 



Memphisia mempliisia Khalil. Lateral view of cephalic portion of body. 



Nerve collar. — The thick nerve collar is placed round the 

 oesophagus '25 ram. from the cephalic end. 



Genital organs. — Male : The testes are convoluted irregularly, 

 reaching to within 3 mm. of the head. There is a dilated, 

 elongated vesicula seminalis. The ejaculatory ducts penetrate 

 the cement gland. This is of enormous length, and is apparently 

 divided into three parts by deep grooves. The ejaculatory ducts 

 open into the cloaca. 



Female : The thin-walled vagina proceeds cephalad in the 

 long axis of the body. The two strongly muscular ovejectors 

 open into its apex side by side, connecting it with the two dilated 



