Genus Nettastoma Rafinesque 
Nettastoma RAFINESQUE, Carr. Nuov. Riant. Animal* Sicil., 1810, p 
66. Type Nettastoma melanura RAFINESQUE, monotypio. 
Hyoprorus KOLLOKER, Verh. Fhys. Med. Gessell. Wflrzburg, vol. 4* 
1883* p. 101. Type Hyoprorus messinensls KOLLOKER, monotypio. 
(Larva.) 
Snout much produced, depressed, without fleshy proboscis. Median 
vomerine teeth somewhat larger than others. Nostrils nearly superior, 
anterior at bony portion of snout tip, posterior above and before eye. 
Gill openings moderate. No phyloric appendages. Air vessel present. 
Head with numerous muccus pores. Dorsal low, begins nearly over gill 
opening. 
