158 Transactions. — Zoology. 



EXPLANATION OF PLATE IV. 



A. Paryphanta busbyi. Teeth — a ordinary view ; b from above ; c side view X 80, 



B. Onchidella patelloides. Teeth — a central tooth ; b lateral tooth ; c marginal 



tooth ; d side view of marginal tooth X 480. 



C. Bulivms gibbosa. Teeth X 480. 



D. Bulimus variabilis. Teeth X 480. 



E. Latia neritoides. Teeth X 280 ; a base from behind. 



F. AmpJiibola avellana. Teeth X 280 ; a central: 6 first lateral ; c and d marginals. 



G. Patula coma. Portion of radula X 30. 



H. Patula hypopolia. Portion of radula X 30. 



I. Patula igniflua. Portion of radula X 30. 



K. Placostylus bovinus. Eadula X 2. 



L. Paryphanta busbyi. Eadula, natural size. 



M, Daudebardia novoseelandica. Eadula, natural size. 



N. Helix fatua. Portion of radula X 70. 



0. Amphibola avellana. Eadula X 15. 



P. Latia neritoides. Eadula X 15. 



Q. Bulimus gibbosa. Eadula X 15. 



E. Onchidella patelloides. Eadula X 6. 



S. Milax antipodum. Eadula x 6. 



T. Bulimus gibbosa. Jaw X 30. 



U. Latia neritoides. Head of animal. (Spirit specimen.) 



V. Bulimus gibbosa. Animal— a from above ; b from below. 



W. Amphibola avellana. Eeproductive organs — a hermaphrodite duct ; b albumen 



gland ; c oviduct ; d vas deferens. 

 Note. — The dotted lines on the radulas show the direction of the transverse rows 

 of teeth. 



Akt. XX. — Notes on the Anatomy of the Bitentaculate Slugs of New 



Zealand. By Professor F. W. Hutton, of Canterbury College. 



[Bead before the Philosophical Institute of Canterbury, Brd March, 1881.] 



Plate V. 



In the " Transactions of the New Zealand Institute," vol. xi., p. 332, I 

 described a new genus of bitentaculate slugs under the name of Konophora. 

 This year, through the kindness of Professor Parker, I have been enabled 

 to examine another specimen, and find that after having been in spirit 

 for some time a lateral groove appears dividing the body from the foot, 

 as in Janella, and that the anatomy is so like that of J. bitentaculata that a 

 new genus seems hardly necessary for its reception. I therefore propose 

 to regard Konophora marmorea as a species of Janella, distinguished from 

 the other two species by not tapering rapidly to the tail, by its conical eye- 

 peduncles, and by the form of the central row of teeth, as described 

 further on. 



