EXPLANATION OF PLATE XV. 
Goniostropha pritchardi, Eth. fil. 
Fig. 1. Shell seen from the front, showing mouth. 
„ 2. A similar example to Fig. 1. 
„ 3. Shell seen from the back. 
„ 4. A whorl, showing the amount of angularity, and position and 
nature of the band, x 2. 
Mourlonia duni , Eth. fil. 
„ 5. Imperfect shell, seen from the back ; the sutural band is plainly 
distinguishable. 
Helicotoma johnstoni, Eth. fil. 
„ 6. Upper side, showing depressed spire. 
„ 7. Under side with umbilicus. 
„ 8. Back, exhibiting great width, perhaps somewhat assisted by dis- 
tortion. 
Trochonema ? nodosa , Eth. fil. 
„ 9. Imperfect shell, seen from the back. 
„ 10. The same, seen from the front. 
Holopea wellingtonensis , Eth. fil. 
„ 11. Natural section of the whorls, showing the form of the latter. 
