594 CHONDROPTERYGII. 



From what part of the Sturgeon is isinglass obtained, and how is it pre- 

 pared ? What sp. of Sturgeon are mentioned and what is said of them ? 

 What is the 2nd ORDER of CARTILAGINOUS FISHES ? How is it character- 

 ized? What is the 34th FAMILY? What is said of their size, voracity, 

 &c.? What is said of the White Shark? Of the Thresher S.? What 

 other sp. are mentioned? What is said of the Spiny Dog-fish and the 

 Spotted Dog-fish ? Of the Angel-fish and Saw-fish ? What is the 35th 

 FAMILY? Give their characters? What sp. of RAYS PROPER are mentioned? 

 What is said of the EAGLE RAYS ? Of the Electric Ray ? What is the 3d 

 ORDER of CARTILAGINOUS FISHES? What peculiarity gives name to the 

 order? What is the 36th FAMILY? What is said of this FAMILY ? What 

 of the Sea Lamprey ? What of the Mud Lamprey ? Of the Myxinoids or 

 Glutinous Hags ? What is the 4th ORDER of CARTILAGINOUS FISHES? How 

 is the term sometimes employed ? What Family does it include ? How 

 does Miiller rank it? What is it called by Yarrell ? Describe this fish. 



Name and trace from the Chart some of the largest fish, giving a sketch 

 of each from the book. Which is the largest of the Mackerel Family? 

 Which next? Which is the largest of the Flat-fishes? In what do they 

 diiFer from all other fish? Which of the Placoids is the largest? How do 

 the caudal fins of this order differ from those of other orders ? What fam- 

 ilies present the most singular forms ? Which are nearly round ? Which 

 long and slender? Which three or four sided? Describe the Sun-fish and 

 Chimaera from the Chart. Which fish crawl upon land or climb trees, and 

 in what orders are they found 



