BONAPARTE S SYSTEM. 



91 



IV. Order. — Cartilaginei. 



32. Family. 



Acipenser Linn. 

 Polyodon Lac. 



Acipexserid^. 



General 12 

 America 1 



33. Family. Chim^rid^;. 



Chimeera Linn. Med., Arctic 1 

 Callorhynchus Gron. Pacific 1 



34. Family. Squalid^;. 



Scyllium Cuv. General 15 



Pristiurus Bon. Medit. 1 



Squalus Linn. 



Carcharias Raj., Cuv. General 20 

 1 

 1 

 1 

 3 

 4 

 3 

 i 



Alopius Raf. Medit. 



Rhineodon Smith Atlantic 



Somniosus Le Sueur Ditto 



Lamna Cuv. 



Galeus Raf., Cuv. 

 Mustelus Cuv. 

 Notidanus Cuv. 



Hexanchus Raf. 



Heptranchus Raf. 

 Selache Cuv. Atlantic, &c. 



Cestracion Cuv. - Australia 

 Spinax Cuv. Medit, &c. 



Centrina Cuv. Medit., &c. 3 



Scymnus Cuv. General 7 



Zygasna Antiq., Cuv. India 4 



Squatina Bum. Med., Am. 6 



It AIRE. 



Warm seas 7 

 Ditto 11 

 Ditto 4 

 Ditto 11 



Ditto 20 

 Red sea 3 



36- Family 



Pristis Lath. 

 Rhinobatus Sch. 



Rhina Sch. 

 Torpedo Dum. 



Leiobatus Blain. 



Dasybatus Blain. 

 Trygon Antiq. 

 Anacanthus Ehrerib. 

 Myliobates Dum. Warm seas 11 



Rhinoptera Kuhl Ditto 4 

 Cephaloptera Dum. Ditto 3 



36. Family. Petromyzonid.e. 



Gastrobranchus Bloch Atlantic 2 



Petromyzon LAnn. General 6 



Myxine Linn. India 1 



Ammoccetus Dum. Europe 2 



Total number of the species 3586 



(81.) We are not, in general, favourable to these ex- 

 positions of methods which we do not adopt; and we have., 

 therefore, somewhat abridged the foregoing by omitting 

 the divisions of the sections, orders, &c. ; but the fami- 

 lies, genera, &c. are all included, so that the reader will 

 at once perceive in what way our own series differs from 

 both this and M. Cuvier's. We regret, however, that 

 our space will not allow us to insert a similar expo- 

 sition of the arrangement of professor Rafmesque, be- 

 cause, although artificial, there is much to admire in it, 

 and he was the first to commence that general breaking 

 up of the Linnaean genera into minor groups^ which 

 Cuvier and his disciples subsequently followed. We 

 shall, however, in the course of this work, introduce 

 several of the genera and sub-genera proposed by this 

 able and zealous zoologist, and shall substitute his names 

 for those of other writers, ■whenever they have a prior 

 claim, and whenever his groups can be sufficiently made 

 out. 



(82.) Of natural systems of ichthyology, or those 



