32 THE VERTEBRATE SKELETON. 



Family Cestraciontidae. Cestracion Port Jackson 



shark. 

 Acrodus, 



Family Scylliidae. Scyllium spotted dog-fish. 

 Family Lamnidae. Odontaspis. 

 Family Carcharidae. Galeus tope. 

 Family Spinacidae. Acanthias spiny dog-fish. 



Scymnus. 

 Family Squatinidae. Squatina (Rhina) angel fish. 



Group BATOIDEI. 



Family Pristidae. Pristis saw-fish. 

 Family Raiidae. Raia skate. 

 Family Myliobatidae. Myliobatis eagle ray. 

 Family Trygonidae. Trygon sting ray. 

 Family Torpedinidae. Torpedo electric ray. 



Suborder (4). ACANTHODII. 

 Family Acanthodidae. Acanthodes. 

 Family Diplacanthidae. Diplacanthus. 



Order 2. HOLOCEPHALI. 



Family Chimaeridae. Chimaera rabbit fish. 

 Harriotta. 

 Callorhynchus. 

 Ischyodus. 



Order 3. GANOIDEI. 

 Suborder (1). CHONDROSTEI. 

 Family Palaeoniscidae. Palaeoniscus, 



Trissolepis. 

 Family Acipenseridae. Acipenser sturgeon. 



Scaphirhynchus. 



Family Polyodontidae. Polyodon (Spatularia) spoon- 

 beaked sturgeon. 

 Psephurus slender-beaked sturgeon. 



