EXPLANATION OF PLATE XLVIII. 
NAUTILUS CooKana Whitf. (p. 285), 
FIG. 1. View of a large specimen which has been obliquely compressed. A portion of the coil has 
been removed to show the inner volution, cast of the umbilicus, etc. The wood-ent out- 
line on page 286 is of the opposite side of this specimen. 
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