ON JULINIA. 7 



roides the inner or more median of the two appears as a 

 "troisieme epithelium vibratile de caracteres tout particulieres.'^ 

 Just beneath each of the recurved lips of the endostyle a 

 muscle-band runs along its entire length. At the posterior 

 extremity the right lip is continued backwards as a ciliated 

 ridge (" raphe posterieur ") which becomes continuous with 

 the cesophageal funnel. 



Digestive Tract. — The funnel-shaped opening of the 

 oesophagus into the branchial chamber is large and convoluted 

 (PI. 2, fig. 13), and the columnar ciliated oesophageal epi- 

 thelium which covers it is sharply marked off at its edge from 

 the flattened epithelium of the branchial sac. Close to the 

 free surface of the cesophageal epithelium is a layer of deeply 

 staining granules of unknown nature. The oesophagus has 

 thick and convoluted walls (PI. 2, fig. 19), and its hinder 

 end projects for a little distance into the stomach, where it 

 forms a sort of valvular opening (PI. 2, fig. 23). 



The stomach (PI. 1, fig. 4) has the form of an oval sac, 

 smooth on the outside but having the lining epithelium thrown 

 into oblique longitudinal folds. This epithelium is very badly 

 preserved in all our specimens, but it can be seen that the cells 

 are columnar and stain deeply. 



Embedded in the lining epithelium of the stomach, or lying 

 free in its cavity, are certain large oval or pyriform cells 

 (PI. 2, fig. 25). These have sharp outlines and very granu- 

 lar protoplasm, stained only faintly by haematoxylin and not 

 at all by carmine. The nucleus is large and transparent, and 

 contains a large deeply-staining nucleolus. In one or two 

 cases a small segment, marked off from one end of the cell as 

 shown in fig. 25 a, confirms a belief suggested by the nuclear 

 and other characters that these are parasitic Gregarines. 



A slight constriction separates the stomach from the 

 intestine (PI. 2, fig. 23). The latter is of nearly uniform 

 diameter throughout its length, there being no division into 

 duodenum, chylific ventricle, and rectum. Its walls are 

 slightly folded, and it is lined throughout by columnar epithe- 

 lium. The terminal part projects slightly into the cloacal 



