II. REFERENCES TO THE PLATES AND FIGURES. 61 



c. Thickening of the cell-wall at the place of division of the secondary cells. 



Fig. 3. a. Distal portion of the primary cell of Eccrina lonr/a, filled with granules and globules. 



b. First secondary cell, filled with granules. 



c. Outline of second secondary cell. 



d. Arthromitus growing from Eccrina. 



e. Its nucleus of attachment. 



f. A tuft of Cladophi/lum. 



g. Its nucleus of attachment. 



Fig. 4. Terminal secondary colls of the same thallus as Fig. 0. 



a. Filled with granules. 



h. In outline. 

 Fig. 5. Secondary cells of Eccrina lonrja. 



a. In outline. 



h. Filled with granules. 



c. Detached cells, which appear to adhere by one end to the sides of the parent thallus. 

 Fig. 6. Three detached secondary cells. 



a. Filled with globules and granules. 



h. In outline. 

 Fig. 7. Young thallus of Eccrina longa distended with globules ; its upper part considerably dilated. 

 Figs. 8-13. Different forms assumed by the young of Eccrina longa. 



Fig. 8. ^i^ inch long; 9, jij inch; 10, ^i^ inch; 11, ^j^ inch; 12, jij inch; 13, more highly 

 magnified, j^-^ inch. 



Fig. 14. Arthromitus cristalus, from the large intestine of Julus marginatus. 



a. Nucleus of origin. 



b. Mucous membrane. 



c. Consolidated articuli. 



d. Spores. 



e. Clachpliijtum. 



Fig. 15. Portion of another individual, more highly magnified. 



a. Developing sporules. # 



b. Ripe sporules. 



PLATE VI. 



Fig. 1. An individual of Ascaris infecta, which had a large number of thalli of Enterobryia clegans 

 growing upon it. 



a. Buccal organ. 

 h. Gizzard. 



c. Intestine. 



d. Rectum. 



e. Anus. 

 /. Ovary. 



g. Generative aperture. 



h. Bunches of Arthromitus growing upon the thalli of Enlcrobri/us. 

 Fig. 2. Anterior portion of the body of Ascaris infecta, with three thalli of E. clegans growing upon it. 



a. Lobes of the mouth. 



b. Buccal organ. 



c. Gizzard. 



d. Commencement of intestine. 



e. Ganglia. 



f. Primary cells of Enterobri/ns, filled with granules and globules, and having very numerous bunches 



of Arthromitus growing upon them. 



g. Pedicle of attachment. 

 



