PLATE XVII 



Fig. i. Longitudinal section, x 6o, of column of tissue in the first lamina 

 of the wax plug of Balaenoptera physalus. SC, stratum corneum; 

 SL, stratum lucidum (the section is cut off-centre so that the stratum 

 granulosum does not show); FN, flattened nuclei; CD, ceruminous 

 duct. 



Fig. 2. Longitudinal section, x 60, of column of tissue in the second 

 lamina of wax plug from Balaenoptera physalus showing reversal of 

 curvature. SL, stratum lucidum; SC, stratum corneum. 



Fig. 3. Longitudinal section, x 60, of one of the papillae on the corium 

 of the distal end of the glove-finger from Balaenoptera physalus. 

 CD, ceruminous duct; CG, ceruminous gland. 



Fig. 4. Longitudinal section, x 60, of one of the columns of tissue of the 

 first lamina of the wax plug of Balaenoptera physalus. SG, stratum 

 granulosum; SC, stratum corneum; FC, fusiform cell; CD, ceruminous 

 duct; SL, stratum lucidum. 



