Fig. 
PLATE X. 
1. Trochus Bunburyi, p. 63. 
la. 
— — magnified three times. 
— _— back view. 
Trochus spiratus ? var., p. 106, and Plate XIII, fig. 6. 
— magnified. 
— front view. 
Trochus Dunkeri, p. 61. 
— _- magnified. 
Trochus Ibbetsoni, p. 62. 
— _- magnified. 
Trochus pileolus, p. 63. 
_ — magnified. 
— = another example. 
Pleurotomaria clathrata, p. 79. 
_ — magnified three times. 
Trochus anceus, p. 63. 
oe — specimen magnified. 
Trochus plicatus, p. 61. 
— — magnified. 
Pleurotomaria pagodus, p. 77. 
Trochotoma discoidea, p. 84, upper surface. 
— — magnified. 
— _— side view. 
= = costee magnified. 
Pleurotomaria obesa, p. 79. 
Pleurotomaria discoidea, p. 78. 
Pleurotomaria composita, p. 80. 
= _ portion magnified. 
Pleurotomaria scalaris, p. 77. 
Trochotoma obtusa, p. 83. 
— — front. 
— — back view. 
Trochotoma conuloides, p. 82. 
Trochotoma tabulata, p. 83. 
= _— front view. 
. Trochotoma obtusa ?, p. 83, base. 
— — surface magnified. 
. Trochotoma extensa, p. 83. 
to a back view. 
Trochotoma acuminata, p. 82. 
