Analytical Synopsis of the Order of Squali. 373 



With teeth ; pectoral fins nicked, 

 With teeth ; pectoral fins entire, 

 Without teeth, 



Squatina. 

 Squalus. 

 Aodon. 



6. — The first naturalist who introduced decided innovations 

 or improvements in the arrangement of the Squali was Rafines- 

 que. In a work* published in 1810, in Sicily, he indicated the 

 following new genera and species. The names which it is 

 believed should be retained for them, when different from those 

 used by Ratinesque, are also given. 



Carch arias taurus 

 Dalatias sparophagus 



" nocturnus 

 Tetroras angiova 

 Isurus oxyrhinchus 

 Cerictius macrourus 

 Alopias macrourus 

 Heptranchias cinereus 

 Galeus melastomus 

 Squalus uyato . 

 Hexanchus griseus 

 Etrnopterus aculeatus 

 Rhina squatina 



Odontaspis taurus. 



. Scymnus lichia. 



Squalus acanthias. 



Cetorhinus maximus. 



. Unknown. 

 Alopias vHlpes. 



Pristiurus melanostomus. 



Spinax niger. 



7. — A short time afterwards, in the " Indice d'ittiologia siei- 

 liana," he named, and characterized two more genera founded 

 on formerly known species. They are the following : — 



Oxynotus centrina 

 Sphyrna zygsena 



Cestracion zygsena. 



The distinctive characters given by Rafinesque to his genera 

 are exhibited in the following analytical synopsis. 



* Caratteri di alcuni Nuovi Generi, e nuovi specie di Animali e piante delta 

 Sicilia. Palermo, 1810. 



