I'lATE XCIX. 



[Part W.—Xuvrijilcr 18913.] 



Haughtonia conkekta, Pt'i'. 



Fiff. 1. The animal, viewed from the right side, X 2-2. 



2. Tlie mucous pore, seen from behind, x 8. 



3. The mantle-edge and dorsal lobes, detached, x 2. 



4. The mantle-edge in vicinity of the respiratory aperture, showing the rudimentary 



right shell-lobe, x 9. 



5. Genitalia, X 2' 5. 



5 a. The male organ, from two different sides, X 4.'5. 

 5 b. Ditto, with lower muscular sheath cut open, X 8. 



6. The centre teeth of the radula, x 365. 



G a. The median at the 20th tooth to the 25th lateral, x 305. 



Gb. The outermost laterals, X 3G5. 



7. The jaw, X 8. 



8. Sculpture of the shell, x 24. 



