Fig. 
Figs. 
Figs. 
igs. 19-22. 
Lo 
oo 
1h Eas. 
15-18. 
s. 238-26. 
PLATE X. 
DAT MANET ACTH S LUD TN ARAM (dele) iarcie 4 ety sialaiel sere eictenene 
. A pedicle valve. Jacksonburg, Locality 174A. (x2). 
A brachial valve. Jacksonburg, Locality 174A. (x2). 
DAT MAND EM AG SUBANO UAm Aun (( Cons) eminem nies rennet setter 
A brachial valve. Jacksonburg, Locality 174 A.° 
. Posterior view of a complete specimen. Same locality. 
SCENIDIUIN “AUTHONENSIS, (Sarduaeeeas: + ccice mick onienieioe 
. A brachial valve. Jacksonburg, Locality 174 A* (x2). 
. A nearly complete pedicle valve. Same locality. (x2). 
. Profile of the same in outline. (x2). 
CAMARELLA TNORNATA, Th. SP... ccc cae ccc wae we eon wa ae 
. Pedicle, brachial and lateral views of a complete, large 
specimen. Hainesburg, Locality 192 A. 
PARASTROPHIA HEMIPLICATA (Elall) =. oak cis nie ee celciale 
Brachial, pedicle, anterior and lateral views of a com- 
plete specimen. Drake’s Pond, near Newton, Locality 
136 B. 
RHYNCHOTREMA INAEQUIVALVIS (Castel.).............. 
Brachial, pedicle, anterior and lateral views of a complete 
specimen. Jacksonburg, Locality 174 A. 
REWNCHOTREMA DEN DATAS (Ela) ))ine scrctaeie cicicccie tistereselets 
Pedicle, brachial, anterior and lateral views of a complete 
specimen. Jacksonburg, Locality 174 A. (x2). 
ZYGOSPIRA) RECUBVIROSTRA™ \Ghiallli)h cr aeyetececierarel cleteieierneie 
Brachial, pedicle, anterior and lateral views of a complete 
specimen. Jacksonburg, Locality 174 A. (x2). 
TZYGOSPIRA NICOLGETD «(Weeds Ss)i ie seo teehee cievere 
. Brachial, pedicle, anterior and lateral views of a complete 
specimen. Near Beaver Run, Locality 79 A. (x4). 
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