938 E. A. Schäfer, On the structure of cross-striated muscle. 



Fig. 29. Three wing-sarcostyles with sarcoplasm-granules between. An isolated 

 sareous element is also represented. Magnified 870 diameters (Vespa). 



Fig. 30. Moderately extended wing-sarcostyle. magnified 2300 diameters (Vespa). 



Fig. 31. Three wing-sarcomeres , showing the attachment of the envelope to the 



transverse membranes and the structure of the sareous elements. Magnified 



2300 diameters (Vespa). 



Fig. 32. Part of wing-sarcostyle, with sareous element split longitudinally (Vespa). 



Fig. 33. Three wing-sarcomeres showing sareous elements dragged into a cup-shape 

 in process of teasing (Vespa). 



Fig. 34. Wing-sarcostyle. extended, with some of the sareous elements partly 

 dislocated (Vespa). 



Fig. 35. Sarcostyle of wing-muscle (Vespai extended, showing the sareous elements 

 cleft in the middle (Hensen's stria). Magnified 2300 diameters. 



Fig. 3f;. Sarcostyle of wing-muscle showing tendency to separation of the ends of 

 the sareous elements (Vespa). Magnified 2300 diameters. 



Fig. 37. Isolated sareous elements of wing-muscle of Vespa, showing their tubular 

 composition, a. surface view b. profile view. Magnified 2300 diameters. 



Fig. 38. Part of sarcostyle of wing-muscle of Vespa with the sareous elements 

 seen obliquely. Diagrammatic. 



Fig. 39. Leg-muscle of Harpalus ruficornis, showing long sareous elements with 

 short clear intervals. The sarcoplasm is also seen. 



Fig. 40. Leg-muscle of the same with short sareous elements and long clear 

 intervals within which the sarcoplasmic enlargements (here double) are very 

 distinct. 



Fig. 41. Similar fibre from leg-muscle of Vespa vulgaris with short sareous 

 elements and long clear intervals, showing the ordinary appearance of the 

 sarcoplasmic enlargements. The transverse membranes are also apparent. 



Fig. 42. Fibre of leg-muscle of Harpalus ruficornis retracted, showing short, 

 square looking sareous elements and short clear intervals. The sarcoplasm. 

 which is quite unstained, is in the form of clear longitudinal lines. 



Fig. 43. Fibre of leg-muscle of Harpalus ruficornis , showing moderately long 

 sareous elements, stained by gold, and also the sarcoplasm with a double 

 row of enlagements in the clear intervals. 



Fig. 44. Similar fibre form a small species of Vespa, partly broken. The transverse 

 membranes are also shown. 



