378 



W. HAROLD LEIGH-SHARPE 



type, nature, and conformation as the clasper gland of the 

 same animal, and that instead of being an organ of special sense 

 it was obviously a mucus-secreting gland (fig. 14). 



m.s.c- 



u.m. 



s.m: 



Fig. 13 Rhina squatina. Vertical longitudinal section of the anterior end of 

 the clasper gland Alum-carmine. L, lumen; m.s.c, mucus-secreting cells; s.m., 

 striped muscle; u.s., unstriped muscle. 



