EEFEEENCES TO THE PLATES AND FIGURES. 



PLATE I. 



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

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

 their length. 



a. Mucous membrane, covered with hexahedral epithelial cells. 



b. Primary cells of Enterohryus, filled with granules and globules. 



c. Spiral turn performed by the thallus of Enterohryus elegans 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 Enterohryus. 



h. Pedicle of attachment of Enterohryus. 



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

 Fig. 2. Thalli of Enterohryus attenuatus, growing from a shred of basement-membrane, from the ventri- 

 culus of Passalus cornutus, magnified about twenty diameters. 



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



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



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



c. Pedicle. 



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



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

 triculus of Julus pusillus. 



a. Hexahedral epithelia of the mucous membrane. 



h. Thalli of Enterohryus, exhibiting the spiral arrangement and internal structure. 



c. Primary cell. 



d. Secondary cells. 



e. Pedicle of attachment. 



PLATE II. 



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

 ventriculus of Julus marginatus. 



a. Outline of the portion of mucous membrane. 



h. Cylindrical epithelial cells of the mucous membrane. 



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



tively small quantity of granules. 



d. Pedicle of attachment. 



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



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



