CESTODARIA 459 



region ; the body iiiid head are oval in transverse section. 

 The testicular and uterine regions, which are roughly equal 

 in length, together occupy about one-tliird of the total 

 body-length. The post-ovarian region is at least equal in 

 length to the combined testicular and uterine regions. The 

 hind end of the body gradually tapers to a fine point. 

 The head region is normally sagittate in form, its base 

 only being slightly broader than the testicular region, 

 is oval in transverse section, highly muscular, and Ijears 

 thirteen to twenty-six deep longitudinal grooves wdiich 

 are not suctorial or fixative in function ; highly con- 

 tractile. Post-ovarian vitellaria about equal, as regards 

 area covered, to the anterior vitellaria. Eggs (in Ijalsam) 

 measure 87-6-41 -8 microns in length and 201-256 

 microns in l)readth, thus Ijeing very small compared with 

 eggs of Caryophyllaeus. Parasitic in intestine of 

 the Siluroid Synodontis schall, Anglo-Egyptian 

 Sudan. 



Wenyonia acuminata, Woodland, 1928. 



Length of body varies from 17-5 to 34-5 mm. and maximum 

 breadth (in testicular region) 1-2 to 1-5 mm. The body is 

 not externally divisible into regions but is nematodiform 

 and oval in transverse section. The testicular and uterine 

 regions, which are roughly equal in length, together 

 occupy about two-thirds of the total body-length. The 

 post-ovarian region is never more than one-third the length 

 of the combined testicular and uterine regions, and is 

 usually less. The hind part of the body only slightly 

 tapers and ends in a blunt point. The head region is 

 tapering and finely pointed and narrower than the testicular 

 region ; it is not highly muscular, not specially contractile, 

 and bears no longitudinal grooves. The post-ovarian 

 vitellaria are not so numerous as the anterior vitellaria. 

 Eggs (in balsam) measure 84- 7-36- 6 microns in length 

 and 21 •9-25-6 microns in breadth, and are distinguished 

 from the eggs of all other (at present) known Caryo- 

 phyllaeidae by the egg-shell being covered with 

 minute spinelets. Parasitic in the intestine of Syno- 

 dontis membranaceus, Anglo-Egjq^tian Sudan. 



Wenyonia mi nut a, Woodland, 1928. 



Length of body about 8-5 mm. and breadth 0-8 mm. 

 The body is fluke-like in form, being flat, oval in outline, 

 and with bluntly pointed extremities. The uterine region 



