76 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 
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ee Bis hang 
UES Sr ir, 115 
Canyon war, | 213! 1 tt tr 
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<a M17 \\* ’” 
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DEBS dee ' \ SENS 
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Fig. 5.—Main canyon of the Coyote mountains. 
copiously, wrinkle-pitted penis-papilla, abruptly terminated and 
about $ as long as the penis, as shown in Plate. VI, fig. 3. The 
organs in two large specimens measure: 
PASC UtING. ete Ones oo See a ee ae 118093 118054 
ene Ghat MeMmieh sas. hae eke A ee 18 mm. 175 /mami 
Raed oe ENNIS, Sa RRL, Seer oM eda 14 °* 1Se4 ake 
ee ee las Ui) se 8 cs eae ees 1 a 10,2 ss 
ek, Hee Ee LEAIE LOR 2 ince Book ty ep ee 108 e 7 Fhe 
PN aT NAVE LTA hie canna La De oh. Aye 165, 
“© spermatheea and duct... .... 19. te 
Pla tecgyal hie, 9.2) ieieen a7 oe a 3, 4 1 
At Stations 114, 118, 119 the shells are rather thin, very large, 
glossy, last whorl of unusual width, parietal callus thin. Height 
16.3, diam. 27.3 mm., 4} whorls (Plate. II. figs. 1,2, Station 118). 
Others from the same station are not more than 25.5 mm. diameter. 
These large shells closely resemble S. a. capax except in the em- 
bryonic shell, which is that of S. ambigua. 
In other Stations, 112, 113, 115, 116, the shells are smaller, 
often somewhat more solid. Often the spire is much depressed, 
as noted in Bobb’s Butte specimens. Height 15, diam. 26.5 mm., 
Station 112. Height 12, diam. 21 mm., Station 112. It is these’ 
smaller shells which form a perfect series connecting the large 
forms with typical S. ambigua. 
