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eras 
3. Placenticeras sancarlosense Hyatt 
3. Placenticeras planum Hyatt 
1,2. Placenticeras intercalare Meek 
. Placenticeras intercalare Meek 
2. Placenticeras whitfieldi Hyatt 
ILLUSTRATIONS. 
. Placenticeras guadalupze (Roemer) 
. Placenticeras sancarlosense Hyatt, 
fi vconseesons eee 
Placenticeras sancarlosense var. pseudosyrtale Hyatt - 
. Placenticeras newberryi Hyatt 
. Placenticeras sancarlosense var. pseudosyrtale Hyatt) 
. Placenticeras planum Hyatt J 
. Placenticeras intercalare Meek 
. Placenticeras intercalare Meek } 
. Placenticeras intercalare var. costatum Hyatt! ~~~" 
. Placenticeras intercalare var. costatum Hyatt, 
a 
. Placenticeras placenta (DeKay ) 
. Placenticeras placenta (DeKay ) \ 
. Placenticeras stantoni var. bolli Hyatt) ~~ 
. Placenticeras stantoni var. bolli Hyatt.-..-........- 
2. Placenticeras stantoni var. bolli Hyatt..-..--.....-- 
. Placenticeras stantoni var. bolli Hyatt 
. Placenticeras pseudoplacenta Hyatt 
3. Placenticeras pseudoplacenta Hyatt.......--.-----.- 
2. Placenticeras pseudoplacenta var. occidentale oa 
. Placenticeras whitfieldi Hyatt 
. Placenticeras whitfieldi Hyatt 
5. Placenticeras whitfieldi yar. tuberculatum Hyatt --- 
6-8, 
. Placenticeras spillmani Hyatt 
346 
