362 ENTOZOA. 



bles the little -worm (Syngamus trachealis of Siebold, Sclerostoma 

 syngamus of Diesing) wMch. gives rise to tlie " gapes" in birds ; 

 but the male of the latter species is comparatively small, whilst the 

 vaginal outlet of the female is placed much further forward. 

 Kiichenmeister's " Manual" furnishes an excellent account of the 

 " j3Egyptian chlorosis" said to be produced by the Sclerostoma duo- 

 denale ; a tolerably minute account of the symptoms and pathologi- 

 cal appearances being also given by Davaine in his admirable work 

 (Part I., pp. 117 — 120), which I have several times referred to ; 

 and those who are interested in checking the "gape disease " of 

 fowls I may be permitted to refer to my memoir on " Sclerostoma 



Fis. 11. — Male example of Sclerostoma duodenale (enlarged) ; with a separate view of the caudal 

 bursa (more highly magnified). — Kuchenmeister. 



syngamus," in the fifth volume of the "Journal of the Proceedings 

 of the Linnean Society," (Zool. Div., p. 304) an abstract of it being 

 likewise given in the first part of the present work (p. 84-91). 



29. OXYUEIS VERMICULAEIS. 



0. vermicularis, Bremser ; Chiaje ; Duges ; etc. 

 Ascaris vermicularis, Linneus ; Miiller ; etc. 

 Fusaria vermicularis, Zeder. 



General and Speciflo Characters. — A small nematode helminth, the male measuring 

 scarcely the i of an inch in length, whilst the female varies from J" to very nearly A", 

 the latter especially characterized hy a long and gradually-tapering capillary tail, ter- 



