THE ANATOMY OF AN AUSTRALIAN LAND PLANARIAN. 93 
cutting. Zeiss F. oc.2. al. ep. alimentary epithelium ; gr. granules in the epithelial 
cells; . nucleus; m./. muscle fibres on which the epithelium rests. 
Fie. 17.—Globular cells from the alimentary canal. Zeiss F. oc. 2. 1. nucleus ; 
gr. granules. 
Fig. 18.—Kpithelium from the anterior end of the alimentary canal, from 
specimen killed with corrosive sublimate and cut by the paraffin method. Zeiss F, 
oc. 2. am. amceboid bodies of the cells projecting into the lumen of the alimentary 
canal ; nk. elongated neck of the cell; 7. nucleus; gv. granules. 
- Fig. 19.—Portion ofa vertical tangential section, showing the arrangement of the 
two superficial muscle layers. Zeiss D. oc. 2. d. m. f. layer of diagonal muscle fibres 
(corresponding to the external circular layer of Moseley) ; ¢. l. f. external longitudinal 
fibres, lymg immediately beneath the preceding; 7. groups of rod-like bodies on their 
way to the surface between the bands of longitudinal fibres. 
Figs. 20, 21.—Young mother cells with rod-like bodies developing in them. 
Zeiss F. oc. 2. x. nucleus; +. rod-like bodies. 
Fig. 22.—Older mother cell with the rods so far developed as to hide the 
nucleus, but still showing the outline of the unbroken mother cell. Zeiss F. oc. 2. 
Fig. 23.—Gyroup of rod-like bodies, the product of a single mother cell, from the 
special zone of rod-like bodies. From a specimen killed with osmic acid and cut 
frozen without staining (the rods appeared of a deep blue colour). The mother cell 
has apparently been ruptured and the rods are separating at their outer ends. Zeiss 
F. oc. 4. (The ends of the rods are blunter than usual.) 
Fig. 24.—Three ejected rod-like bodies found lying in the mucous on the surface 
of the animal. Zeiss F. oc. 2. 
Fig. 25.—Longitudinal section of an eye. Zeiss F. oc. 2. J. c. lens slightly 
shrunk so as to leaye a space around it. /.c. pigmentcup, seen to be composed of 
several more or less separate elongated portions, three of which are shown in the 
section. The pigment is deposited in the form of fine granules. 
Fig. 26.—Tyransyerse section across the inner portion of an eye, showing the 
nucleus (7). Zeiss F. oc. 2. J. c. and p. c..as in the preceding figure. 
Fig. 27.—Three unicellular slime glands, from beneath the alimentary canal, 
showing the hardened rods of mucous in connection with them. Zeiss F’, oc. 2, 
sl, g. slime gland; 7. nucleus; mu. 7. mucous rod, 
