Figs 1-2 
Figs. 3-4 
Figs 5-6 
Fig. u 
Fig. 8 
Fig. 9. 
Figs. 10-11. 
Fig. IPs 
1. 
Fig. 14. 
15 
Fig. 16. 
Figs. 18—21. 
Wigs. 22-24. 
. Vertical views of two brachial valves. 
5. A brachial valve. 
. A small pedicle valve. 
PLATE IX. 
ORBICUEOIDEAS LAMETROSIAL) (Ela linn iaenstee were tertertalsty 
. Vertical and lateral views of a nearly perfect brachial 
valve. Jacksonburg, Locality 174A. (x2). 
SCHIZOCRANTAUREEOS A: (Ela) iaeemineieinicie eiaicicieeheereieeee 
Jacksonburg, Lo- 
cality 174 A. 
ORBICULOIDHANY Spa Indet. eee eae eae 
5. Vertical and lateral views of an imperfect brachial valve. 
Near Branchville, Locality 75 A. 
. An incomplete valve. Near Beaver Run, Locality 79 A. 
LINGUEA RICENTWORNMIES) Eballll Reeser tale Gere lee rae 
8. A nearly perfect valve, partially exfoliated. Jacksonburg, 
Hocatity 174 A. (2). 
CRANTA: (Sp?) undetis.:.2,. as oe ee OPC OE ne een 
A complete brachial valve. 
T9 A. 
Near Beaver Run, Locality 
LINGULASMA, GALENE NSIS) (Wi 6c Siena cence scenic 
Vertical and lateral views of the internal cast of a brachial 
valve. Drake’s Pond, near Newton, Locality 136 B. 
RANEVNES QO ULNA “Ady THRINACHAgH GE mms) eee eee eleanor 
View of a nearly complete pedicle valve. 
Locality 174A. 
Profile of the same specimen in outline. 
Jacksonburg, 
PLECTAMBONLTES  SHRICHUSIUSOWA) Eee EEE EE eErere 
A nearly perfect, large pedicle valve. 
Locality 79 A. 
Near Beaver Run, 
Jacksonburg, Locality 174 A. 
STROPHOMEN A, ENCURVARAN (Sheps)seemieee eee ean 
An imperfect brachial valve. Jacksonburg, Locality 174 A. 
Same locality. 
ORTHIS  TRICENARTAN Conrad ee ieee eee ee 
Brachial, lateral, pedicle and posterior views of a nearly 
perfect specimen. Jacksonburg, Locality 174 A™ 
PLECTORTHIS) PLICAREE TAS (GElall) emer eee 
Pedicle, lateral and anterior views of a nearly complete 
specimen. Near Beaver Run, Locality 79 A. 
(399) 
146. 
144 
148. 
145. 
148. 
149 
150 
151 
152 
