SCHEME OF CLASSIFICATION 13 



Family XIV Dasyatidce. Also known at Trygonidae. 

 Genus 22 Dasyatis 



centrura 37 (Common Sting Ray) 

 ORDER IV HOLOCEPHALI (Chimeras). 

 Family XV Chimceridce. 

 Genus 23 Chimsera 



affinis 38 (Chimsera) 

 Genus 24 Hydrolagus 

 colliei 39 (Ratfish) 

 Sub-class III Teleostomi (Sturgeons and their allies and true-boned fishes). 



(Series A x — Physostomous Teleostomes, or such in which the air-bladder, as a rule, 

 communicates with the oesophagus, or digestive tract, by a pneumatic duct). 

 SUPER ORDER I CHONDROSTEI (Sturgeons and their allies). 

 ORDER V ACIPENSEROIDEI (Equivalent to the super-order) 

 Family XVI Polyodontidm. 

 Genus 25 Polyodon 



spathula 40 (Paddle-fish) 

 Family XVII Acipenseridce. 

 Genus 26 Acipenser 



transmontanus 41 (White Sturgeon) 

 medirostris 42 (Green Sturgeon) 

 sturio oxyrhynchus 43 (Common Sturgeon) 

 rubicundus 44 (Lake Sturgeon) 

 brevirostrum 45 (Short-nosed Sturgeon) 

 SUPER-ORDER II TELEOSTEI (True-boned Fishes) 

 ORDER VI HOLOSTEI (Extant representatives, Gar-pikes and the Bowfin). 

 Family XVIII Lepidosteidce. 

 Genus 2? Lepidosteus 



osseus 46 (Common Garpike) 

 platostomus 47 (Short-nosed Garpike) 

 Family XIX Amiicke. 

 Genus 28 Amia 



calva 48 (Bowfin: Dogfish) 

 ORDER VII MALACOPTERYGII 2 (Clupeoids, Salmonoids, and Viper Fishes and their 

 allies). Equivalent (at least in so far as extant forms are concerned) to the order 

 Isospondyli and to part of the Iniomi as regarded by Jordan and Evermann, and to 

 the Scyphophori (a group of African fishes) placed by these authorities in Ostariophysi. 

 Sub-Order 1 Cltjpeoidea (Clupeoids) 

 Family XX Elopidce. 

 Genus 29 Tarpon 



atlanticus 49 (Tarpon) 



'In series A are included the super-order Chondrostei, and the orders Holostei, Malacopterygii, Ostariophysi, 

 Apodes, and Haplomi, of the super-order Teleostei ; whilst series B (page 21) embraces the remaining orders of Teleostei. 



^"Unquestionably the most generalized sub-order, having most in common with the Holostean ganoids." 

 Boulenger. 



