568 WALLACE. 



DESCRIPTION OF PLATE. 



Fig. I. Cross section of axillary gland in adult. X 18. 

 Fig. II. Part of Fig. I, enlarged. X 90. 



(a) Superficial cells. 



{b) Polygonal. 



{c) Elongated. 



(d) Columnar. 



(e) Mucous. 

 (/) Clavate. 



Macerated cells. 



Longitudinal section of gland in larva | inch in length. X cSo. 



Longitudinal section of gland in larva 3 inches in length. X 70. 



Enlarged view of Fig. I. X 100. 



Longitudinal section of opercular glands in larva ^ inch long. X 50. 



Outline, showing position of glands. 



Longitudinal section of skin. X 1 20. 



