CONTENTS OF THE THIRD PART 
OF THE 
SUPPLEMENTARY PLATES 
TO THE 
ZOOLOGICAL JOURNAL. 
Tas. XVI. bis. 
1. Bulinus hemastomus, young. 
2. Head of the animal of a full grown specimen of the same 
3. Egg of the same. 
4. Egg broken to show the perfectly formed Shell within. 
Vide Vol. I. pp. 131, 566, and Vol. II. p. 440. 
Tas. XVII. bes. 
Fig. 1, 2. Succinea Cuvierii. Vol. II. p. 443. 
3. The same with the animal magnified. 
4, A young Shell of the same, with its apparently stercoreous 
covering. 
5. Form of the under side of the foot. 
6. Helicina variabilis, with its animal, magnified. Vol. II. p, 443. 
7. Upper side of the front of the head. 
8. Under side of the foot. 
9. Operculum. 
10, 11, and 14. Three varieties of the natural size. 
12, 13. Two varieties, magnified. 
Tas. XVIII. 
Fig. 1. Modiola rhombea. Vol. III. p. 229. 
2. Animal of Serpula Arundo, Vol. III. p. 229. 
3. Animal of Serpula Filograna. Vol. III. p. 230. 
