Generic Position of Benson s Hylix hyba. 57 



Fig. \.—Khasielht hyha, Bs. ; shell, x 48. 



Fig. 2.— Side view of mautle-edge from right side, showiug the obscure 



right shell-lobe, foot, &c. X 8. 

 Fig. 3. — Genitalia. X Ao. 

 Figs. 3rt, 36. — The penis, as seen from two opposite sides, to show the 



coiled caecum and position of the retractor muscle attachment, the 



kalc-.sac or flagellum, &c. x 8. 

 Fig. 3 c. — A portion of same organ more enlarged, slightly pressed 



between two glass slips and viewed by transmitted light,' to show 



the close-coiled cajcum. ; the dark portion is part of a spermato- 



phore. X 12. 

 Fig. '6d. — Terminal end and distal end of an organ not located in the 



genitalia and with which it may have no connexion, x 12. 

 Fig. 4.— Jaw. X 24. 



Fig. 5. — Central tooth and three admedian teeth of the radula. X 308. 

 Fig. 5 a. — Eighth to eleventh admedian and sixteenth to eighteenth 



lateral teelh. 



