LIST OF FISH. 3 



Charles Buonaparte (' Systema Ichthyologium,' 1838, 4to.) divides 

 the cartilaginous fish among three of his sub-classes, according to 

 the form of the gills. Sub -class 1. Elasmobranehii. Section 1. 

 Plagiostomi. Order 1. Selatha. Fam. 1. Raidse. — 2. Squalidae. 

 Order 2. Acanthorrini. Fam. 3. Chimaeridae. Sub-class 3. Pomato- 

 branchii. Section 2. Micrognathia Order 6. Sturiones. Fam. 8. 

 Polydontidae. — 9. Acipenseridee. 



Professor John Miiller, in his new arrangement of fishes (Weign. 

 Arch. 134, 1845), divides the cartilaginous fish into three sub- 

 classes. III. Ganoidea. Order 2. Chondrostei. Fam. 1. Acipen- 

 serini. — 2. Spathularia;. IV. Elasmobranehii seu Selachii. Order 

 1. Plagiostomi. Sub-order 1. Squalidae. — 2. Rajidae. Order 2. 

 Holocephali. Fam. 1. Chimeerse. Sub-class 5. Marsipobanchii 

 seu Cyclostomi. Order 1. Hyperoartii. Fam. 1. Petromyzonini. 

 Order 2. Hyperotreti. Fam. 1. Myxinoidea. Sub-class 6. Lepto- 

 cardii. Order 1. Amphioxini. Fam. 1. Amphioxini. 



Mr. Gray, in the 'Synopsis of the British Museum' for 1842' 

 arranged them as follows: — 1. Acipenseridte. — 2. Chim&radce- 

 — 3. Squalidce. — 4. Raidce. — 5. Petromyzidce. — 6. Amphioxidce, 

 p. 147 and 150. 



Sub-Order I. ELEUTHEROPOxMI. 



Gills free. 



Ch. abranchies libres, Cuv. Reg. Anim. ii. 2 ed. 27, 378. 



Ch. Branchiostega and Ch. Holocephala, Mull. Abh. Akad. Berl. 



1816. 

 Ch. Eleutheropoma, De Kay, Hist. New York. 

 Eltropomiapomachia, part, Rafin. Anal. Nat. 92, 1815. 

 Elasmobranehii and Pomatobranchii, part, Bonap. Syst. Ichth. 



1838, 13. 

 Ganoidia chondrostei, Midi. Weign. Arch. 134, 1848. 



Section A. STURIONA. 



Ch. Brachiostega, Midi. Abh. Akad. Berl. 1836. Mag. Zool. $- 



Bot. i. 405. 

 Les Sturioniei.s ou chondropterygiens a branchies libres (part.), 



Cuv. Reg. Anim. 2 ed. ii. 378. 

 Sturiona, Rafin. Anal. Nat. 92, 1815. 



Pomatobranchii Micrognathi, Bonap. Syst. Ichth. 1838, 13. 

 Sturiones, Bonap. Syst. Ichth. 1838, 13. 



B 2 



