106 



THE CESTOIDEA 



,'/ 



Fio. V. 



Diagram of a transverse section through the body wall of a young Ligula. (After Bloch- 

 mann.) a, cuticle ; h, basal membrane ; c, outer circular muscles ; d, epidermal cells only a 

 few are represented ; each is prolonged upwards through the basal membrane to the base of the 

 cuticle ; e, a gland cell (Korbchenzelle) ; J, a flame cell (the index line unfortunately stops at a 

 lime cell ; the flame cell lies a little inside it. Another flame cell is shown between the index 

 lines 0, o) ; g, bundle of outer longitudinal muscle fibres ; h, a calcareous corpuscle, " lime cell," 

 with peripheral nucleus ; i, dorso-ventral muscle fibre, terminating above in branches amongst 

 the circular fibres ; j, much branched cell, which Blochmann calls "parenchyma" cell, but it 

 relations to muscle fibres recall a nerve cell ; fc, nerve plexus ; I, excretory vessel giving off 

 capillaries, terminating in flame cells ; m, a sense cell, terminating below the cuticle above, 

 and connected below with the nerve plexus ; n, a myoblast ; o, the processes of myoblast ter- 

 minating in the circular muscles ; p, free end of sense cell ; q, a pore in the cuticle, above the 

 KorbchenzeUe ; r, a small part of the most superficial layer of cuticle. 



