PARASITES OP ELEPHANTS. 



257 



cuticle, shaiply demarcated from the rest of the body. It is 

 •05 mm. long, and projects by the same amount from the 

 body. The anterior cuticular expansion is not striated, but 

 the posterior is. 



M oath collar. — Tliis is very short and indistinctly separated 

 from the rest of the body. It is -02 mm. in length and -12 mm. 

 in diameter. 



Anterior leaf-crown. — This consists of 36 incompletely sepa- 

 rated leaflets. They do not project freely above the mouth 

 collar. 



Head jKqnllce. — There are four submedian head papillae. They 

 are stumpy and surmounted with knobs continuous with, 

 apparently, a duct traversing the papilla. The two lateral head 

 papillas do not project on the surface. 



Text-fio'ure 53. 



Memphisia memphisia Klialil. Lateral view of head. 



Cervical 2)apillce. — -These are very long and delicate. They are 

 placed '92 mm. from the cephalic extremity. 



Jlouth capsule. — Seen from the ventral surface the mouth 

 capsule is practically quadrangular, being slightly broader at the 

 outlet. A side view shows the same structure as funnel-shoped 

 narrowing at the outlet. The length of the oral cavity is '08 mm. • 

 its maximum breadth is -09 mm., and from before backwards it 

 measures '05 mm. The chitinous ring surrounding the oral 

 cavity is thick and nearly vertical . Its upper extremity is slightly 

 bent peripherally, as seen in ventral view. There are two teeth 

 projecting into the mouth cavity, 



CEsojjhagas. — There is a shallow oesophageal funnel lined with 

 cuticle. The oesophagus is short and broad. It is '48 mm. in 



