3f)6 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



carpos, and is inserted on a broad tendon at the posterior 

 side of the propodite (eat. P.). 



The flexor has its origin on the anterior wall of the 

 carpos, and is inserted on a large tendon at the anterior 

 side of the propodite (f.P.). 



Dactylopodite. There is a dorsal extensor and a 

 ventral flexor. 



The extensor is comparatively small, and arises from 

 the dorsal or posterior walls of the propodite. It is 

 inserted on to a narrow tendon which is situated 

 immediately above and between the two hinges of the 

 dactylos (ext. D.). 



The flexor is an extremely large muscle which 

 occupies the greater portion of the propodite. It arises 

 from the ventral and anterior walls of the latter, and is 

 inserted on a very broad tendon which is attached to the 

 ventral side of the dactylopodite (f. D.). 



XI. First walking leg (PL III, fig. 22). 



Goxopodite. There is a posterior extensor and an 

 anterior flexor. 



The extensor is situated in the fifth pleural muscle 

 chamber. It passes downward, and is inserted on a long 

 narrow tendon immediately behind the dorsal hinge 

 (ex. C). 



The flexor is a large muscle situated in the anterior 

 and upper portions of the fifth sternal muscle chamber. 

 Its origin is partly on the anterior w T all of the chamber 

 and partly on the median plate. It passes outward and 

 downward, and is inserted on a broad tendon on the 

 anterior portion of the coxopodite (/. C). 



Basi-ischiopodite. There is one dorsal extensor and 

 one ventral flexor muscle. 



The extensor occupies the dorsal and posterior portion 



