240 



T\ II. EOflEWORTH. 



species. Fiirbringer stated that in Folypterus, ? species, there 

 are four coraco-branchiales attached to the four branchial bai-s. 

 Pollard did not describe these ; he stated that in Polypterus, 

 ? species, the coraco-hyoideus sends additionally a long' 

 tendon to the lower end of the first cerato-branchial, and also 

 that there is a muscle belonging- to the system of the coraco- 

 arcuales, which, arising from the fourth, i.e. last cerato- 

 branchial, passes horizontally forwards and affixes itself to 

 the lower ends of the second aiid first cerato-branchiales. It 

 is apjnirently suppHed by the united first and second spinal 



Text-fig. (?2. 



su^ lov owi' 



Raiia. ]a,rva witli fully formed hind legs, transverse section. 



nerves. There is also ''a flat muscle oF small size, which 

 takes its origin from the last cerato-branchial. It loses 

 itself in the skin near the anterior edge of the dermal cUivicle. 

 Its innervation was not traced." 



In Polypterus Senegal us (larvie 7i to i)\ cm. long) 

 there is a pharyngo-clavicularis externus and internns ( = 

 coraco-branchialis IV) attached anteriorly to the fourth 

 cerato-branchial, and passing downwards through the coraco- 

 hyoideus to the shoulder-girdle (Text-fig. 37). In front of 

 this is a longitudinal jnuscle passing from the fourth to the 

 second cerato-branchial, and innervated l)v the nerve to the 



