REFERENCES TO THE PLATES. 



PLATE I. 



LiMAX VARIEGATUS. 



Fig. I. The integument laid open, with the viscera in situ. 1. Buc- 

 cal body; 2. salivary gland ; 3. stomach; 4. intestine; 5. termination 

 of intestine in the rectum ; 6. blind tube from the termination of the in- 

 testine ; 7. oviduct; 8. pulmonary chamber ; 9. heart ; 10. renal organ; 

 11. left superior tentacle ; 12. sub-oesopliageal ganglia; 1.3. left stomato- 

 gastric ganglion; 14. liver; 15. origin of the retractor muscle of the 

 penis. 



Fig. II. The viscera dissected apart. 1. Buccal body; 2. stomach; 

 3. intestine; 4. termination of do. ; 5. blind tube from do. ; 6. salivary 

 glands; 6.* salivary duct ; 7. liver; 8. hepatic duct; 9. testicle; 10. 

 epididymis; 11. prostate gland; 12. penis; 13. retractor of do. ; 14. 

 ovary; 15. o^^duct; 16. genital bladder; 17. pulmonary chamber; 18. 

 aorta; 19. cephalic branch of do.; 20. visceral branch of do.; 21. sub- 

 oesophageal ganglia; 22. left superior tentacle 



Fig. III. The generative apparatus. 1. Testicle; 2. epididymis; 



3. prostate gland; 4. penis; 5. retractor of do. ; 6. ovary; 7. oviduct; 

 8. genital bladder ; 9. cloaca. 



Fig. IV. The pulmonary chamber laid open and magnified four 

 diameters. 1 . Floor formed by the muscular peritoneum ; 2 pulmonary 

 orifice; 3. rectum; 4. anal aperture ; 5. renal organ ; 6 duct of do. ; 7. 

 pericardium laid open; 8. heart; 9. pulmonary vein ; 10. pulmonary 

 arteries ; 1 1 . aorta. 



Fig. V. Testa. 



Fig. VI. Dental plate. 



PL.\TE II. 

 Figs. I. — IV. Arion hortensis. 



Fig. I. Organs in situ. 1. Buccal body; 2. stomach; 3 intestine; 



4. termination of do. ; 5. liver; 6. testicle; 7. ovary; 8. oviduct; 9. 

 cloaca; 10. pulmonary chamber ; 11. heart; 12. retractors of the penis 

 and vagina. 



VOL. I. 31 



