EXPLANATION OF PLATE IV. 
1. Reduced outline of the type of P. maconelli, Reeve, from P.Z.S., 
1851, PL xii., upper figure. 
2. Reduced outline of Mon. Austr. Land Shells, PI. iii., fig. 5 . 
3-5. Reduced outlines from specimens lent by Dr. Cox. 
6. Reduced outline of the type of P. falconeri, Reeve, from Concho- 
logia Iconica, Vol. vii. (Helix), PI. lxviii., fig. 355. 
7. Reduced outline of specimen from the Richmond River, N.S.W. 
(Aust. Mus. Coll.) 
8. Reduced outline of Mon. Austr. Land Shells, PI. xvi., fig. 6. 
