Fig. 23. From a transverse section through the caudal trunk of a 90 mm. 

 L. osseus. No corpuscles of any kind were found within this trunk through- 

 out this series of sections. X 225. 



Fig. 24. Transverse section through the caudal ray vessels of a 90 mm. 

 L. ossetis. X -'-5. 



Fig. 25. Is from a transverse section through the lateral trunk of an 

 adult L. osseus. Note that the endothelial canal is bounded by a fibrous 

 connective tissue and that the red corpuscles greatly predominate over the 

 white. X 225. 



