G2 EEFERENCES TO THE PLATES AND FIGURES. IL 



Fig. 3. Portion of a thallus, with numerous bunches of Arthromitus cristatiis growing upon it. 

 Fig. 4. Jliddle portion of the body of Thelastomum attenuatum, with two thalli of Enterohrijus growing 

 from it. 



a. Intestine ; the spots represent its epithelial cells. 

 h. Oviduct. 



c. Vagina. 



d. Generative aperture. 



e. Tcgumentary glands. 



f. Enterohryus. 



g. Pedicle. 



h. Arthromitus. 



i. Bunch of Arthromitus growing from the generative aperture. 

 Fig. 5. Posterior portion of the body of Streptostomum agile. 



a. Annuli of the body. 



b. Tail, cut off below. 



c. Posterior extremity of the intestine, with the hexahedral epithelial cells visible. 



d. Rectum. 



e. Anus. 



/. Bundles of muscular fibres. 

 g. Portion of the oviduct containing an ovum. 

 h. Enterohryus elcgans. 

 i. Bunches of Arthromitus cristatus. 

 Fig. 6. Side view of the posterior extremity of Ascaris infecta. 

 a. Portion of the intestine. 

 h. Rectum. 



c. Anus. 



d. Portion of Enterohryus elegans, with a very long pedicle of attachment («). 

 Fig. 7. Posterior view of the posterior extremity of Ascaris infecta. 



a. Intestine. 



h. Rectum. 



c. Young thallus of Enterohryus, with a very long pedicle (d), growing from the tail. 



e. Arthromitus cristatus. 



f. Cladophytum comatum. 



Fig. 8. Alimentary canal of Passalus cornutus. 



a. Proventriculus. 



h. Ventriculus. 



c. Intestine. 

 Fig. 9. Ventriculus of Passalus. 



a. Commencement. 



h. Caecal pouch opening into the ventriculus. 

 Fig. 10. Inferior portion of the ventriculus laid open. 



a. The mouths of the sacculi. 



h. The longitudinal folds. 



c. The transverse folds. 



d. V-shaped corneous plates. 



e. Commencement of the fecal intestine. 



