244 Shark and Compayiy 



The Families of the Selachians 

 BATOIDS 



Torpedinidae (Electric Rays) 

 Rajidae (Skates) 

 Potamotry gonidae (River Rays) 

 Dasyatidae (Sting or Whip Rays) 

 Gyfjmuridae (Butterfly Rays) 

 Urolophidae (Round Sting Rays) 



Myliobatidae (Eagle Rays and Spotted Duck-Billed Rays) 

 Rhinopteridae (Cow-Nosed Rays) 

 Mobulidae (Devil Rays) 

 Links 

 Rhino batidae (Guitarfishes) 

 Pristidae (Sawfishes) 



SHARKS 



Chlamy doselachidae (Frilled Sharks) 

 Hexanchidae (Six-Gilled Sharks and Seven-Gilled Sharks) 

 Carchariidae (Sand Sharks) 

 Scapanorhynchidae (Goblin Sharks) 



huridae (Mackerel Sharks, Mako Sharks, Great White Sharks) 

 Cetorhinidae (Basking Sharks) 

 Alopiidae (Thresher Sharks) 

 Orectolobidae (Nurse and Carpet Sharks) 

 Rhmcodo7itidae (Whale Sharks) 

 Scy liorhinidae ( Catsharks ) 

 Pseudotriakidae (False Catsharks) 

 Triakidae (Smooth Dogfishes) 

 Carcharhinidae (Requiem Sharks) 

 Sphyrnidae (Hammerhead Sharks) 

 Squalidae (Spiny Dogfishes) 

 Dalatiidae (Spineless Dogfishes) 

 Echinorhinidae (Bramble Sharks) 

 Heterodontidae (Horn Sharks) 

 Links 



Squatinidae (Angel Sharks) 

 Pristiophoridae (Saw Sharks) 



designated a species (Somniosus antarcticiis Whitley, 1939). From these 

 clues we know that Selachians have penetrated the most frigid seas on 

 earth. 



In 1954, off^ Dakar, French West Africa, over one of the ocean's 

 deepest abysses, Lieutenant Commander Georges S. Houot of the French 



