El tdoinira .s / tcx 517 



= Fusaria marina, Zeder, ISO.*^. 



= Filaria jnscium, Rud., 1808-18] 0, etc. 



= Capsularia safaris, Zeder, 1820. 



= Strongylus gigus (young), Breinser, 1824 (?) 



z= Spiroptera rudolphi, Delia Chiuje, 1825 (?) 



= Filocapsularia, Deslongchamps, 1791 to 1827. 



= Agamonema piscium, Diesing, 1850-1. 



= Agamonema capsularia, Diesing, 1850-1. 



— Filaria (?) marina, Baird, 1853. 



(see pi. XXTX., tigs. 4, 5, 6, 7). 



The specimens on Avhich this record and description are based 

 were forwarded to me by Dr. A. A. Brown, of the Victorian 

 Department of Agriculture, through the courtesy of Mr. S. S. 

 Cameron, Chief Veterinary Officer for Victoria. These Nema- 

 todes, which Dr. Brown has named in the daily press 

 " Strongylus spiralis piscium," are apparently very prevalent in 

 Victorian fish, being found in the peritoneum. Tlie mass (V'2 by 

 20 mm.) in my possession, which was taken from Barracouta, 

 consists of approximately 60 worms, each individual tightly 

 coiled in a flat spiral about 3 min. in diameter, and having 2^ to 

 3h coils, these coils being arranged in 3 to 5 layers thick. They 

 are whitish in colour and opac|ue. Surrounding each is a some- 

 what loose covering, and the mass is bound together by a tough 

 fibrous capsule, which encloses each, and makes it a matter of 

 considerable difficulty to separate them from one another, especi- 

 ally as the rigidity of the body causes the worm to break rather 

 than uncoil. As stated above, each is enclosed in a loose, 

 slightly wrinkled cuticle-like investment which can be, with 

 care, drawn straight off from the anterior or posterior end of 

 the contained animal like a glove finger, leaving the entire 

 animal behind ; also, the main features of the animal can be 

 seen through this membrane, which assumes the external shape 

 of the enclosed worm. 



The several dimensions of the body of three typical individuals 

 are as follow : — 



