24 AKT. 8. 1. IKEDA : THREE NEW AND 



geneous in structure and can be deeply stained with haematoxylin. 

 The possibility is not excluded that the bodies here referred to 

 are but coagulated masses produced from the lymph-like fluid 

 that permeates the cutis tissue. 



At places in the cutis, especially in close proximity to the 

 epidermis, are found relatively large cells of a roundish shape, 

 with finely granular cytoplasm strongly stainable with eosin (figs. 

 27 and 28, iv.c). They are devoid of plasmic processes and can 

 therefore be easily distinguished from ganglion cells. Possibly 

 they represent a sort of free wandering cells. 



The strongly developed muscular layer is of the usual com- 

 position, consisting, as it does, of the longitudinal (fig. 26, l.m.), 

 the circular {cm.) and the oblique systems. The longitudinal 

 system forms a continuous sheet. To special thickenings of that 

 sheet are due the five, equidistant, pale-colored, longitudinal lines 

 visible on the outside of the body-wall. 



Here may be mentioned the well developed muscles that are 

 attached to the bulbous bases of the paired hooks. One of them, 

 the interbasal muscle (figs. 18 and 19, i.m.), stretches itself 

 transversely between the hook bulbs ; the rest are the radial 

 muscles {r.m.) that radiate from each of the latter. 



With regard to the peritoneal lining of the body-wall, I 

 have found no points of special interest. The internal surface 

 of the body-wall presents a deep brownish red color. 



The Alimentary Canal. — This is exceedingly long and takes 

 a convoluted course which is complex but definite (fig. 23). 

 Throughout its length the canal is fixed to the body-wall by 

 means of numerous muscular filaments and by some muscular 

 mesenteries. It may be said to consist of five main parts, viz., 



