Figs. 
Figs. 
Wig. 
Fig. 
Figs. 
Gi) 
o . 
op) 
10. 
112: 
13. 
14-15. 
(394) 
PLATH IV. 
POLYGMRATAU SINISTRAY MUS Hos ore iiterratoiole ite ee aoe 
Vertical and profile views in outline. Columbia, Locality 
210 A. 
RAPHISTOMA (COLUNMBLAINAY Aly SDicrsmeiclarcssisias eile elenceete ioc 
Vertical and profile views of the type specimen. Colum- 
bia, Locality 210 A. 
. Cross-section of the peripheral angle, showing the thicken- 
ing of the shell. (WMnlarged.) 
ECCYLIOMPHALUS SUBELLIPTICA DN. Sp.....-..-2----- ee 
. View of the type specimen. Columbia, Locality 210 A. 
CGMURTOMENES SL NU ATU Seles WGaimVice eueecraler siciciietoke ts tetsitete ete 
. Lateral view of outer volution, with cross-section in out- 
line. Columbia, Locality 210 A. 
DAT MAINE AN) WERDP TOI) Clelamalversrcic/s is eberatsionetsrs slavatoretene 
A large brachial valve. Columbia, Locality 210 A. (x2). 
Two pedicle valves. Same locality. (x2). 
INVA HON, moma Oeil aaa oolbsG aoa cosas ac 
A pedicle valve. Columbia, Locality 210A. (x2). 
SYNTROPHTA WATERATES, (MVE) ct acciele cho -llsbenorstenelevete § 
Two views of a pedicle valve. Columbia, Locality 210 A. 
128 
129 
124 
