Bull. U. S. B. F., 1921-22. (Doc. 922.) 



CB 



Ep 



122 



Am JIM CM 



v 



lJ 



12 3 MG 



• 



CS 



Ep 



124 



CM 



Fig. 121. — Photomicrograph of a longitudinal section through tin- smooth side of a labial palp. X 30. 



Fixed in Flemming fluid and stained with Delafield hsematoyxUn. The centrally located ciliated 



canals are continuous with furrows shown in fig. 1:2. 

 FiG. 12;.— Photomicrograph of a longitudinal section through the ridged side of a labial palp. X30. 



Preparation same as fig. in. 

 Fig. i2}.— Section through the stomach epithelium. Am, amocbocyte; BM, basal membrane; CB, 



cuticular border; CM, circular muscles; Ep, stomach epithelium; MG, mucous gland. (After List, 



1902. t 

 Fig. 124. —Section through the stomach epithelium in the posterior region. CM, circular muscles; 

 CS, crystalline style substance; Ep, stomach epithelium. (After List. 1902.) 



