II. REFERENCES TO THE PLATES AND FIGURES. 65 



PLATE VIII. 



Fig. 1. A transverse fold of the ventriculus of Passalus cornutus, with numerous hair-like appendages 

 covered with granulo-filamentous phytoid matter, and bunches of dadophytvm and Corynodadus. 



a. Mucous membrane. 



b. Hairs. 



c. Phytoid substance. 



d. Cladophytum coma/urn, 



e. Corynodadus radiatus. 



f. Arthromitus cristatus. 



Fig. 2. Portion of the mucous membrane of the ventriculus of Jidus marginatus, with patches of granulo- 

 phytoid matter growing upon it. 



a. Patches of granulo-phytoid matter. 



b. Harder nuclei of phytoid matter. 



c. Bunches of Cladophytimi comalum. 



d. Arthromitus cristatus. 



e. Epithelial surface. 



f. Basement-membrane. 



Fig. 3. Portion of Enterobryus eleyans, with two large bunches of Arthromitus cristatus, and a tuft of 

 Cladophytum. 



Fig. 4. Portion of Enterobryus elegans, overgrown with profuse bunches of Arlhromitus cristatus. 



Fig. 5. Summit of a hair-like appendage, from which grow numerous filaments of Arthromitus and other 

 finer phytoid filaments, from the ventriculus of Passalws cornutus, 



Fig. 6. Summit of a primary cell of Enterobryus elegans, from which grows a bunch of Cladophylum 

 comatum. 



Fig. 7. Two branches of Cladophytum, exhibiting minute ramuli. 



Fig. 8. Bunch of Cladophytum comalum, and several long filaments of Arthromilus growing from a 

 portion of the mucous membrane of the ventriculus of Julus maryinatus. 



PLATE IX. 



Fig. 1. Represents a portion of the inner surface of the ventriculus of Passalus cornutus, with its numerous 

 hair-like appendages enveloped in a parasitic, granulo-filamentous, phytoid substance. 



a. Light shading, representing the bottom of the sacculi of the ventriculus, furnished with short hairs. 



b. Broad transverse folds of the mucous membrane, between the sacculi. 



c. d. Longitudinal folds separating the sacculi, and presenting on each side, between the position of 



the transverse folds, a column of closely-set, simple, bidentate, and tridentate corneous spines. 



e. Long hair-like appendages, which border the ventricular sacculi and become the nuclei of large 



masses of growing phytoid matter. 



f. Short hairs, everywhere studding the mucous membrane, and also enveloped with phytoid matter. 

 Fig. 2. Portion of a transverse fold of mucous membrane, from between the ventricular sacculi of 



Passalus cornutus, with its hair-like appendages enveloped in phytoid matter exhibited of the natural colors. 



a. Mucous membrane. 



b. Hair-like appendages. 



c. Granulo-filamentous phytoid matter. 



d. Bunches of Cladophytum. 



e. Bunches of Corynodadus. 



