JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATES VIII, IX, & X, 



Illustrating Professor Lankester's Memoir on " Intra- 

 cellular Digestion and Eudoderm of Limnocodium." 



PLATE VIII. 



Figs. 1 and 2. — Portions of the iugestive endoderm from the proximal end 

 of the gastric tube, showing green unicellular organisms embedded in 

 the protoplasmic network. Drawn from a living specimen as seen 

 with Hartnack's 10 immersion and ocular 4. 



a, nuclei ; b, granules (secretion-products ?) ; x, vacuole filled with 

 products of digestion and broken-down remains of a Protococcus ; 

 y, partially digested Protococoi ; z, Protococcus and Euglena recently 

 ingested. 



PLATE IX. 



Fig. 1. — Portion of the ingestive endoderm from the proximal end of the 

 gastric tube, after treatment with osmic acid and picrocarniiue. 

 Hartnack's 10 immersion and ocular 4. 



ff, nuclei ; b, groups of refriugent substance; c, pseudopodia-like 

 processes of the protoplasm; d, trabeciilae connecting neighbouring 

 cell-masses ; e, vacuole filled with coagulable material, which stains 

 with carmine ; /, intercellular space. The endoderm is in the form of 

 an open meshwork. 



Fig. 2. — A similar piece, showing dark pigmented granules in the walls of 

 the large vacuoles {e). 



Fig. 3. — Oral gastric endoderm, from tlie same specimen as that from 

 which the proximal gastric endoderm of figs. 1 and 2 is taken. 



a, nuclei ; b, full-sized secretion-cells (goblet-cells) ; d, intercellular 

 trabeculae (framework) ; /, intercellular spaces ; ff, adventitiously em- 

 bedded nematocysts ; /i, young secretion-cells. 



Fig. 4. — The same piece focussed so as to show the surface. 



b, the naked ends of the large secretion-cells ; d, the intercellular 

 substance covering in the younger cells and perforated by the larger 

 ones. 



Fig. 5. — A piece of the proximal or ingestive gastric endoderm from another 

 specimen, in which the oral gastric endoderm presented the appearance 

 drawn in fig. 6. 



x, digested Protococcus. Other letters as in fig, 1. The endoderm- 

 cells are gorged with fine granules and the intercellular spaces nearly 

 obliterated. 



