1910.] NATURAL SCIENCES OF PHILADELPHIA, eli 
the figure. The lung is 18 mm. long, kidney 7.5 mm., pericardium 
3.5 mm. The mantle within the last whorl is cream-colored with 
sparse black maculation. Earlier whorls have copious black pigmen- 
tation along the top of the whorls. 
Roar 
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2, \pa Barroot 
5 SH 
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3 Hee 
s . Pine 
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€ 1 
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fS ‘ 
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a 
1 
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ONG 
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Fig. 21.—Principal collecting stations in Cave Creek and the Parks at its head. 
Stations marked A were explored in 1907-8 by Ferriss, the others in 1906 
by Ferriss and Pilsbry. 
