732 THE AMERICAN NATURALIST. [Vor. XXXIV. 
EXPLANATION OF PLATE III. 
Epithelium under 1 dins in. oil immersion objective; s., striated border; 7t, 
nucleus; g., goblet cell; c., cell body. 
Fic. ro (a), (b), (c). iios of epithelium from the first part of the intestine. 
Fic. 11. Section of epithelium from the spiral valve. 
Fic. 12. Section of epithelium near caudal end of the intestine. 
FiG. 13. Isolated epithelial cells showing nuclei at all levels. 
(All figures x 350). 
