244 



DR. M. KHALIL ON THE NEMATODE 



•06 mm. in length in the male, '08 mm. in the female. The 

 diameter is -14 mm. in both sexes. 



External leaf-crown. — The external leaf-crown consists of 

 twelve leaflets. These are the most prominent characteristic of 

 the species in their a]>pearance and arrangement. They are broad, 

 leaf-like, and slightly bent at the tip. They do not protrude 

 above the head. 



Head jJapilloi. — The four submedian head papillae are displaced 

 laterally by the external leaf-crown. They project directly 

 forwards, and each is surmounted by a small papilla, the nature 

 of which is referred to elsewhere. The lateral papillae do not 

 pi'oject, and their termination is marked by a depression. 



Cervical papillce. — The two laterally placed cervical papillae are 

 directed slightly cephalad. They lie '7 mm. from the head end 

 in the male and '86 mm. in the female. 



Text-figure 40. 



Quilonia ethiojoica, sp. n. Head. 



Mouth capsule. — The chitinous mouth capsule is extremely 

 shallow. In optical cross-section it lies oblique to the axis of 

 the body. It is "018 mm. in depth and "12 mm. in diameter. The 

 chitinous mouth capside does not come in contact with the wall 

 of the oral cavity. The latter is practically cylindrical in shape 

 and slightly contracted in the middle. There are apparently no 

 teeth projecting into the mouth cavity. 



Internal leaf-croion. — The twelve leaflets of the internal leaf- 

 crown can be traced from the floor of the mouth canity to about 

 its middle. Each leaflet is broad at its base and tapers to a 

 point. It has a distinct cleft in the middle, and thus each is 

 really two leaflets side by side. 



CEsophagus. — There is a shallow esophageal funnel surrounded 

 by a chitinous rim lying on the three ossophageal columns. 

 The oesophagus is short and thick. It is "SS mm. in length in the 

 male and "57 mm. in the fema,le. It is slightly narrowed at the 



