368 



W. HAROLD LEIGH-SHARPE 



The clasper gland, however, does not precisely resemble that 

 of Raia in being limited to the dorsal side of the siphon sac. 

 The gland (fig. 7) completely surrounds the siphon, and is divided 

 into numerous separate components, which ahnost entirely fill 

 the cavity. The components are compact masses of tissue, not 

 penetrated by ducts, as in Raia, but separated from one another 

 by connective tissue. 



Cl.Gl. 



cm 



Fig. 6 Lamna cornubica. Cl.Gl., clasper gland; ^., apopyle; H., hypopyle; 

 Rh., rhipidion. Immature specimen. 



The individual cells are not, as in Raia, spherical or cubical 

 with large spherical nuclei nearly filling the cell, but are exceed- 

 ingly long and spindle shaped, with elongated nuclei, and fitting 

 into one another in a way that suggests non-striped muscle 

 cells (fig. 8, B). 



The pointed ends of the cells are toward the lumen of the 

 gland. Around the lumen, forming an epithelium as it were, 

 the spindle-shaped cells give way to a type with a fiattened outer 



