TKANSACTIONS OF THE ROYAL MICRO- 

 SCOPICAL SOCIETY. 



DESCRIPTION OF PLATES IV & V, 



Illustrating Mr. Newton^s paper on the Anatomical Differ- 

 ences observed in some Species of the Helices and Limaces. 



PLATE IV. 

 Drawu from nature by E. T. N. 



rig. . . . . 



1.— Reproductive organs of Z. maximus. 



2. — „ „ L. Sowerbii. 



3. — „ . „ Arion ater. 



4. — „ „ L. agrestis. 



5. — Backward turn of the intestine of L. maximus. 



6. — Caecum of L.flavus. 



From drawings by G. Busk, Esq., E.KS., &c. 



A. Spermatozoa, coiled and uncoiled. 



B. Granular ceils. 



c. „ with nuclei. 



D. Transparent cells. 



PLATE V. 

 Drawn from nature by E. T. N. 



7. — Reproductive organs of H. aspersa. 



8. — „ „ H. nemoralis. 



9. — „ „ H. rufescens. 



9a. — The dart-sacs of H. rufescem enlarged. 

 10. — Reproductive organs of H. cantiana. 

 11. — „ „ U. virgata. 



References to the Lettering in both Plates, 



ot. Ovotestis. 

 ep. Epididymis. 

 V. Vitellary, or tongue-shaped gland. 



