Figs. 5-1. 
Figs. 8-11. 
Fig. 12 
13. 
Figs. 14-17. 
PLATE LI. 
ATRYPAs RETRECUDARIS | Ginn) seer ascn coe eee 
. Brachial, pedicle, lateral and anterior views of a nearly 
complete individual. Near Tri-States, Locality 2B. 
RHIPDOMELLA VANU SE Mte= (CELA) eae = na s.s cmeet= cue olaierers 
Pedicle, brachial and lateral views of a complete indi- 
vidual (after Hall). 
RECTICULARIA, FEMBRIATAL (Cong) pacino cee 
Brachial, pedicle, anterior and lateral views of a com- 
plete individual (after Hall). 
STROPHEODON TA: PERPLANA: (CON )ccieeiccie a < ce «e cleeueet 
. A complete pedicle valve (after Hall). 
A complete brachial valve (after Hall). 
ANOPLOTHECA ACUTIPLICATA: (Con.).........02c000.0 
Pedicle, brachial, lateral and anterior views of a com- 
plete individual. Near Flatbrookville, Locality 89 B. 
GHONETES ARCUATA. (Eiallie Os acre lone eee 
An incomplete pedicle valve. Peters Valley, Locality 52 A. 
LEPTABNA-BHOMBOIDATIS. ( WilcK.)'. 2.20 ees oe eee 
A nearly complete pedicle valve. Locality 70 B. 
LOXONEMA- SDx WDCC. oo. ccrare, 0, vs Seaw whe < Se els ieisieye eteveueteters 
Lateral view of an incomplete shell. Near Tri-States, 
Locality 2 B. 
CHONETES ARGUATA (lallls 3... srs cua v alea cic elas omnes ieee 
21. The internal cast of a pedicle valve. Greenwood Lake, 
Fig. 18. 
Fig. 19: 
Fig. 20. 
Fig. 21 
Fig. 22. 
Locality 87 B. 
STROPHEODONTA INEQUIRADIATA Hall.................. 
An imperfect pedicle valve. Newfoundland, Locality 
145 A. 
(449) 
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