PAEASITES OF ELEPnANTS. 



253 



Head glands. — There are four elongated, deeply pigmented 

 bodies surrounding the beginning of the oesophagus. They con- 

 tain orange-coloured granules, suggesting their being glandular. 

 Their anterior end is elongated in the foi-m of a duct lying 1o the 

 outer side of the chitinous ring of the mouth capsule. Their 

 exact termination could not be made out, but probably they 

 traverse the submedian head papillae and open at their tip. The 

 presence of ducts opening on the tip of the head papillpe was first 

 recorded by Cooper Curtice and confirmed by Giles in (Esophago- 

 stovm.m columhianum. 



Both these observers, however, interpreted fhem to be the ducts 

 of the lateral canals. Looss' comment was : " I do not entertain 

 the slightest doubt th.at they have seen the outlet of the head- 

 glands." 



Text- figure 50. 



Text-fio-ure 49. 



'Fteridopliarynx anisa Klialil. 

 Ovi;m. 



Fteridopliarynx anisa Klialil. 

 Female tail. 



Nerve collar. — The thick nerve collar is -25 mm. from the head 

 end. 



Genital organs. — The naale testes are irregularly convoluted, 

 i-eaching to within 3 mm. of the head. The cement gland is long, 

 terminating at the base of the genital cone, whei'e the ejaculatory 

 duct opens into the cloaca. 



The female vagina is a long, straight canal lying in the axis of 

 the body. At its cephalic end the two strongly muscular ovejectors 

 open into it, connecting it with the corresponding uterus. The 

 convolutions of the ovaries reach to within 4*5 mm. of the cephalic 

 end of the body. 



Pkoc. Zool. See— 1922, No. XVIII. 18 



