CLASSIFICATION OF CLASS PISCES. 



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The following sketch of the classification used in this article may be convenient for reference : 



CLASS PISCES. 



DIVISION I. PAL^EICHTHYES (FISHES OF ANCIENT TYPES). 

 ORDER I. DIPNOI (MUD-FISHES). Family Sirenoidei. 



ORDER II. GANOIDEI (FISHES WITH BONY SCALES). 

 Family I. Amiidae (North American Mud-fish). II. Polypteridae (Nile Pike). III. Lepidosteida 1 (Bony Pike). 



ORDER III. HOLOCEPHALA. Family. Chimaeridaa (Chimsera). 



ORDER IV. PLAGIOSTOMATA (FISHES WITH OBLIQUE MOUTHS). 



SUB-ORDER I. SELACHOIDEI (SHARKS). 



Family I. Carchariidae (Blue Shark). II. Lamnidae (Porbeagle). III. Rhinodontidte. IV. Notidanidae (Grey 

 Shark). V. Scylliidae (Dog-fishes). VI. Cestraciontidae (Cestracion) . VII. Spinacidie (Piked Dos] 

 VIII. Rhinidae. IX. Pristiophoridce (Shark-like Saw-fish). 



SUB-ORDER II. BATOIDEI (RAYS). 



Family I. Pristidaa (Skate-like Saw-fish). II. Rhinobatidae. III. Torpedinidao (Electric Rays). IV Raiidae 

 (Skates). V. Trygonidse (Sting Rays). VI Myliobatidae (Eagle Ray). 



ORDER V. CHONDROSTEI. Family 1 . Acipenseridae (Sturgeons). II. Polyodontidse. 



DIVISION II TELEOSTEI (BONY FISHES). 



ORDER I. PLECTOGNATHI (FISHES WITH JAWS UNITED). 



Family I. Sclerodermi (File-fish and Trunk-fish). II. Gymnodontes (Diodon and Sun-fish). 



ORDER II. LOPHOBRANCHII (FISHES WITH TUFTED GILLS). 

 Family I. Solenostomidae. II. Syngnathidae (Pipe-fish and Sea-horses). 



ORDER III. ANACANTHINI (SOFT-FINNED FISHES). 

 SUB-ORDER I. GADOIDEI. 



Family I. Gadopsidae. II. Lycodidae. III. Gadidse (Cod). IV. Ophiididae (Sand-eels). V. Macruridta 

 V I . At eleopodidae. 



SUB-ORDER II. PLEURONECTOIDEI. 



Family VII. Pleuronectidte (Flat Fishes). 



ORDER IV. PHARYNGOGNATHI (FISHES WITH JAWS IN THE THROAT). 



Family I. Pomacentridte. II. Labridae (Wrasse). III. Embiotocidae. IV. Gerridae. V. Chromides. 



ORDER V. ACANTHOPTERYGII (SPINY-FINNED FISHES). 



Family I. Percidae (Perch). II. Pristipomatidae. III. Squamipinnes. IV. Nandidae. V. Mullidae (Red 

 Mullet). VI. Sparidae. VII. Hoplognathidae. VIII. Cirrhitidae. IX. Scorpaenina. X. Polycentridae. 

 XI. Teuthididaa. XII. Berycidte. XIII. Kurtidae. XIV. Polynemidae. XV. Sciaenidae. XVI. 

 Xiphiidae. XVII. Trichiuridas (Hairtails). XVIII. Acronuridse. XIX. Carangidae. XX. Cyttina. 

 XXI. Stromateina. XXII. Coryphaenina. XXIII. Nomeina. XXIV. Scombrina. XXV. Trachmidse. 

 XXVI. Malacanthidae. XXVII. Batrachidae. XXVIII. Pediculati (Sea-devil). XXIX. Cottina (Gurnards). 

 XXX. Cataphracti (Armed Bull-head). XXXI. Comephorida?. XXXII. Discoboli (Lump suckers). 

 XXXIII Gobiidee. XXXIV. Oxudereidse. XXXV. Cepolidae. XXXVI. Trichonotidae. XXXVII. 

 Heterolepidina. XXXVIII. Blenniida;. XXXIX. Acanthoclinidao. XL. Mastacembelidae. XLL 

 Sphyrasnidaa. XLIL Atherinida3. XLIII. Mugilida? (Grey Mullet). XLIV. Gasterosteidae (Sticklebacks). 

 XLV. Fistularidae. XLVI.-Centriscidte. XLVIL Gobiesocidae (Suckers). XLVIII.-Psychrolutidae. 

 XLIX. Ophiocophalidje. L. Labyrinthici (Climbing Perch). LI. Luciocephalidaj. LII. Aphredoderidas. 

 LIII. Lophotidae. LIV. Trachypteridae. LV. Notacanthi. 



ORDER VI. PHYSOSTOMI (FISHES WITH THE AIR-BLADDER OPENING INTO THE MOUTH). 



Family I. Siluridae. II. Characinidae. III. Haplochitonidae. IV. Stern optychidie. V. Scopelidae. VI. 

 Stomiatidae. VII. Salmonida3 (Salmon). VIII. Percopsidae. IX. Galaxidae. X. Mormyridae. XI. 

 Gymnarchidae. XII. Esocidae (Pike). XIII. Umbridae. XIV. Scombresocidae. XV. Cyprinodontida?. 

 XVI. Heteropygii. XVII. Cyprinidae (Carp). XVIII. Gonorhynchidae. XIX. Hyodontidas. XX. 

 Osteoglossidae. XXI. Clupeidaa" (Herrings). XXII. Chirocentridae. XXIII. Alepocephalidae. XXIV. 

 Notopterida\ XXV. Halosauridae. XXVL Gymnotidte (Electric Eel). XXVII. Symbranchidae. XXVIII. 

 Murrcnidae (Eels). XXIX. Pegasidae. 



DIVISION III CYCLOSTOMATA (FISHES WITH A CIRCULAR MOUTH). 



ORDER. MARSIPOBRANCHII. Family I. Petromyzontidaj (Lamprey). II. Myxinidae (Hag). 

 DIVISION IV. LEPTOCARDII (FISHES WITH A THIN HEART). 



ORDER. PHARYNGOBRANCHII. Family. Cirrostomi (Lancelot) . 

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