On the Genitalia o/(AticisfrocepiiaIii3) polypteri. 255 



into the underlying tissue in a s|)ecie3 of Centrolophus from 

 deep water at the Cape, were t'onnd to lead into a network of 

 wide dermal canals, extending over the body, and filled with 

 a viscid oily suhstance. The Cape "butter-fish" — Stroma- 

 tens cnpensis — is hifi;hly prized for its fine flavour, while the 

 Centrolophus referred to produces some kind of sickness or 

 gastric distnrbnnce wlien eaten — facts which have been noted 

 in other meml)ers of the Stromateidae. 



XXVIII. — A short Description of the Genitalia o/" (Ancistro- 

 cephalus) polypteri, Lej/dig, 1853. By A.J. Hesse, B.Sc* 



The Cestode Ancistrocpphalus poli/pferi parasitic in the 

 intestine of Poh/pterus hichir was found by Dr. Loydig of 

 Wurzberg in 1853. He described the scolex, but, as his 

 specimens were either not mature or were the anterior portions 

 of the Cestode, he was unable to give an account of the 

 genitalia. No further account has since appeared. This 

 description is made from material obtained from Professor 

 Leiper's collection. The material was rather limited and 

 preserved in formalin solution. Tliere were present two 

 different kinds of worms. Two were Cyclophyllids, and the 

 rest, consisting of a few pieces of sexually mature proglottides, 

 a few knotted segments, and two heads with about 9 to 15 cm. 

 of strobila, were used by me to give this description. 



External Appearance. 



The worms showed a dirty white colour in the preserving- 

 fluid. As the worms were not complete, a definite length 

 cannot be given. 



The scolex was about 1 mm. long ami "5 mm. broad. 

 Superficially it was club-shaped, with an anterior blunt and 

 rounded margin. 



There was present a crown of hooks in the form of four 

 radiating groups. These were situated on four well-marked 

 ridges. Each group had six claw-like hooks connected by a 

 web-like structure (fig. 1). 



Between the ridges passed down four shallow grooves, 

 which are probably sucking-grooves. These were not well 

 developed at all. 



* From the Helmiuthological Depaituient, Loudoii School of Trojiical 

 Medicine, 



