62 REFERENCES TO THE PLATES AND FIGURES. II. 



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



Fi-''. 4. Middle portion of the body of Thclustomum attcmuifum, with two thalli of Entcvohri/us growing 



from it. 



a. Intestine; the spots represent its epithelial cells. 



b. Oviduct. 



c. Vagina. 



(L Generative aperture. 

 r. Tegumentary glands. 

 f. Enterobri/us. 

 <j. Pedicle. 

 h. Arthromitus. 



{. Bunch of Arthromitus growing from the generative aperture. 

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

 a. An null of the body. 

 h. Tail, cut off below. 



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



d. Rectum. 



e. Anus. 



/. Bundles of muscular fibres. 

 g. Portion of the oviduct containing an ovum. 

 h. Entcroliryus clcgans. 

 i. Bunches of Arthromitus cristafus. 

 Fig. 6. Side view of the posterior extremity of Ascaris m/erta. 

 a. Portion of the intestine. 

 i. Rectum. 



c. Anus. 



d. Portion of Enterohryus elegans, with a very long pedicle of attachment {e). 

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



a. Intestine. 



I. Rectam. 



c. Young thallus of Etiterobryus, with a very long pedicle {iT), growing from the tail. 



e. Arthromitus cristafus. 



f. Cladophytum comatum. 



Fig. 8. Alimentary canal of Passalus cornutus. 



a. Proventriculus. 



h. Ventriculus. 



c. Intestine. 

 Fig. 9. Ventriculus of Passalus. 



a. Commencement. 



I. Csecal 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. 



