54 



NATUBE-STUBY LESSONS. 



F. The Appendages. 



21. Point out the appendages to the body. 



22 {a) Point out those nearest the head. 



{b) How many are there ? 



{c) Compare their position on opposite sides of 



the body. 



The anterior fins are the pectoral fins. 



(d) Sketch the pectoral fin of the fish you are 



studying. 



23. {a) Observe another pair of fins situated farther 



back and more nearly on the under surface. 



The posterior pair of fins situated on or near the abdomen of fish are 

 the ventral ox pelvic fins. 



(J)) Sketch the ventral fin of the fish you are 

 studying. 



DlAOKAU or A FiBH. 



A— Dorsal Fin. D— Pelvic Fin. 



B— Caudal Fin. E— Pectoral Fin. 



C— Anal Fin. L— Lateral Line. 



24. {a) Observe the fins extending along the middle 



of the back. 

 (b) Stretch them out and observe the number of 



bony structures forming the framework. 

 The fin along the middle of the back is the dorsal fin. 



