STRONG YLID J]. 



83 



CHAPTER VI. 



NEMATODA. 



Strongylidse — Genera — The Sclerostoma Syngamus as a type, witli a particular account 

 of the gape disease which it occasions — Structure and development — Remedial 

 methods — The genus Prosthecosacter — Organization of P. convoliitus — Mode of 

 reproduction — CucuUanidee — Genera. 



Strongylidce. — The varied members of tliis family present one or 

 two characters in common, whilst several others prevail almost 

 throughout the entire group. In all the body is round, and 

 sometimes very much elongated and filiform. The mouth is either 

 round, oval, or triangular, frequently very large, naked or armed 

 with a horny pharyngeal armature ; the latter forming either a 



Fi&. 21. — Cephalic extremity of Eustrongylus papillosus, Diesing ; from the oral cavity of a crane 

 {Orus antigone). Magnified. — Original. 



single globular piece, or made up of several distinct pieces. Tail 

 of the male furnished with a bursa, usually emitting two spicules ; 

 in some the place of the bursa is occupied by two divergent mem- 

 branous lobes. 



Genera. — Strong ylus, Muller ; ? Uncinaria, Froehch ; Eustron- 

 gylus, Diesing; = Diocotojohyme, CoUet-Meyret ; Sclerostoma, 

 Rudolphi ; = Ancliylostoma, Dubini ; = Syngamus, Von Siebold ; 



