REFERENCES TO THE PLATES AND FIGURES. 



PLATE I. 



Fig. 1. Numerous tballi of Enterobryus eleyans, growing from a portion of mucous membrane of the 

 ventriculus of Julus munjinntiis. The breadth of the thalli, in the drawing, is greater than the relation of 

 their length. 



a. Mucous membrane, covered with hexahedral epithelial cells. 



l>. Primary cells of Enterobryus, filled with granules and globules. 



c. Spiral turn performed by the thallus of Enterobryus eleijans in its course of growth. 



d. Extremity of a primary cell filled with granular matter. 



e. Secondary cells, usually filled with granular matter. 



/. One of the secondary cells burst, with an escape of the mixed liquid and granular contents. 



g. Arthromitus, a frequent parasitic algoid plant upon Enterobryus. 



h. Pedicle of attachment of Enterobryus. 



i. A thallus in outline, terminated by a single secondary cell. 



Fig. 2. Thalli of Enterobryus attenuates, growing from a shred of basement-membrane, from the ventri- 

 culus of Passalws cornutm, magnified about twenty diameters. 



Fig. 3. Five thalli of Enterobryus attenuatus, very highly magnified. 



a. Basement-membrane of the mucous membrane of the ventriculus of Passalus cornutus. 



b. Primary cells, filled with the characteristic contents of liquid, granules, and globules. 



c. Pedicle. 



d. A few filaments of Arthromitus, parasitic upon the Enterobryus. 



Fig. 4. Four thalli of Enterobryus spiralis, growing from a portion of mucous membrane, from the ven- 

 triculus of Julus pusillus. 



a. Hexahedral epithelia of the mucous membrane. 



b. Thalli of Enterobryus, exhibiting the spiral arrangement and internal structure. 



c. Primary cell. 



d. Secondary cells. 



e. Pedicle of attachment. 



PLATE II. 



Fig. 1. Numerous thalli of Enterobryus elegans, growing from a portion of mucous membrane of the 

 ventriculus of Julus marginatus. 



a. Outline of the portion of mucous membrane. 



b. Cylindrical epithelial cells of the mucous membrane. 



c. Young thalli of Enterobryus, filled with the characteristic contents of liquid, globules, and a rela- 



tively small quantity of granules. 



d. Pedicle of attachment. 



e. Masses of parasitic, granule-filamentous, phytoid matter, growing upon the mucous membrane. 



f. The same kind of matter, growing upon the Enterobryus. 



