Warp. — Nectonema, 
PLATE IIL 
Figs. 31-45. Transverse sections of the alimentary canal froma single series of 
sections. Mayer’s HCl carmine. Apochr. 4mm. Compens. Oc. 4. 
X 280. 
Fig. 31. 7th section of the series. 
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Figs. 46-48. Transverse sections of alimentary canal from the region where it is 
bounded by two cells alone to show diminution in size toward the pos- 
terior end. Apochr.4mm. Compens. Oc. 4. X 230. 
Fig. 46. Kleinenberg’s hematoxylin. 
Figs. 47, 48. Ehrlich’s hematoxylin. 
Fig. 49. Transverse section of alimentary canal to show the normal relation of 
the lumen to the cells. Kleinenberg’s hematoxylin. 2.E. X 610. 
Figs. 50, 51. Transverse sections of the esophageal cell in the same series. Ehr- 
lich’s hematoxylin. 2. E. X 610. 
Fig. 50. To show the relation of the nucleus to the chitinous tube. 
Fig. 51. Two sections beyond the section in Fig. 50 to show disappearance of the 
chitinous tube. 
Fig. 52. Lateral aspect of intestine. The two cells of the opposite side are not 
shown. Ehrlich’s hematoxylin. 2.C. X 165. 
