BEDNAIL : SOUTH AUSTEALIAN CHITONS. 159 



EXPLANATION OF PLATE XII. 



a. dorsal A'iew of entire shell. 



b. anterior, median, and posterior valves. 



c. portion of girdle magnified. 



d. portion of posterior valve enlarged. 



e. lateral view of posterior valve. 



Fig. 1. Ischnochitou juloides. Ad. & Ang. 



2. I'ilsbryi, u.sp. (2* lateral view). 



3. Tateanns, n.sp. 



4. ■ Thomasi, n.sp. 



5. var. 



6. Chiton calliozona, Pilsbry. 



7. exoptandns, n.sp. 



8. Bedualli, Pilsbry. 



