78 



INVERTEBRATE PHYSIOLOGY 



stance. There are numerous large inclusions in the tongues of the end-plate 

 claws which are syncytial, having numerous small nuclei distributed 

 through the claws in a random manner. The end-plate claws do not pass 

 between the myofibrillae, merely resting on the surface of the fiber beneath 

 the sarcolemma. The attachment must be a very loose one, judging by the 

 ease with which the whole plate can be pulled off. The close similarity be- 

 tween locust endings (Hoyle, 1955a) and those of the homopteran 

 Cyclochila australasiae (Tiegs, 1955) suggest that this may be a common 

 type of ending in insects ; a generalized ending based principally on the 

 locust and homopteran endings is illustrated in Fig. 2. This bears a con- 

 siderable resemblance to the amphibian endings described by Couteaux 

 (1947). The terminations of the axons within the ending were, however, 

 not stained. 



FATTy 

 eA/VBLOpB 



CBLl-UJ-AR LAYf'K 

 Of^ SH£ATH 



T/ZACHFA 



Fig. 2. Drawing to show the structure of a doubly innervat- 

 ed locust motor end plate. The final branches of the axons did 

 not stain. 



Multiple endings on single fibers were described clearly by Foettinger 

 (1880). He even obtained fixed specimens showing a series of local con- 



