PLATE XLI. 



[Part IV.— September 1883.] 



Fig. 1, 1 a. Helicarion helen^, n. sp. Sydney. From a drawing by Mrs. H. Forde. 

 2. View of right side of a spirit-specimen, shell removed, showing mantle and lobes 



X 4. 

 .3. View of left side, ditto. 

 4. View from behind. 

 o. Shell, X 4. 

 6. Jaw, X 12. 

 7,7 a, 7 b. Portions of a row of the radula, x .340. 



8. Generative organs, x 4. 

 8 a. Male organ, x 12. 



9. Helicarion cuvieri : generative organs, after Professor Scraper. 

 10. Ditto: teeth of radula, central, Nos. 1, 5, 14, 17, and 20, x 260. 



