Generic Position of Benson s Helix liyba. 57 



Fig. l.—KhasieUa hyha, Bs. ; shell. X 4-8. 



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



right shell-lobe, foot, kc. X 8. 

 Fig. 3. — Genitalia. X 4-5. 

 Figs. 3«, 35. — The penis, as seen from two opposite sides, to show the 



coiled cfeciim and position of the retractor muscle attachment, the 



kale-sac or flagellum, &c. X 8. 

 Fig. 3 c — A poi'tion of same organ more enlarged, slightly pressed 



between two glass sli) s and viewed by transmitted light, to show 



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



phore. X 12. 

 Fig. od. — 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 368. 

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



lateral teeth. 



