n. REFERENCES TO THE PLATES AND FIGURES. 63 



PLATE VII. 



Fig. 1. Anterior extremity of Thdastomum atlenuatum. 



a. Buccal organ. 



b. Gizzard. 



c. Commencement of the intestine. 



d. Nervous ganglia. 



c. Tegumentary follicle ; respiratory? 

 /. Tegumentary gland. 

 Fig. 2. Anterior extremity of Strqtloslomum ui/c(c. i 



a. Buccal organ. 

 h. Gizzard. 



c. Commencement of the intestine. 



d. Portion of the anterior ovary. 



e. Follicle ; respiratory ? 



Fig. 3. Anterior portion of the body of Thelastomum appendiculatum. 

 a. Buccal organ. 

 h. Gizzard. 



c. Intestine. 



d. Diverticulum of the intestine. 



e. Portion of the anterior ovary. 



Fig. 4. Ovum of l^helastomum appendiculatum. 



Fig. 5. Group of Ascaris in/ecta, adhering by their mouths to a shred of epithelium, from the ventriculus 

 of Julus marj inaius. 

 a. Blale. 

 h. Female. 

 Fig. 6. Outline of S/reptostomum gracile. 

 Fig. 7. Anterior portion of the body of Streptostomuvi gracik. 



a. Buccal organ. 



b. Gizzard. 



c. Commencement of the intestine. 



d. Portion of the anterior ovary. 



c. Phytoid filaments growing from the integument. 

 Fig. 8. Anterior extremity of IL/sln'i/nalhus rlijidtis. 



a. Papilla of the mouth. 



b. Buccal organ. 



c. Spinous appendages. 



Fig. 9. Anterior extremity of Hi/strignailius rigidus. 



a. Buccal organ. 



h. Gizzard. 



c. Commencement of the intestine. 

 Fig. 10. Posterior extremity of I/ystngnathus rigidits. 



a. Posterior portion of intestine. 



b. Rectum. 



c. Anus. 



d. Portion of the posterior ovary. 



Fig. 11. Position of copulation of Ascaris iii/ecta. 



a. Male. 



h. Female. 

 Fig. 12. Streptostomum agile, with Enlerobryiis ekgans aud Arihromitus cristalus growing upon it. 



a. Buccal organ. 



