PLATE 37. 
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Eig. 12, 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Striatopora ? uniseptata, Eth. fil. Portion of a bifurcating branch, x 2. 
Fanning Fiver. 
Do. A calico, highly magnified,- showing the single septum. 
Spiriferci curvata, Schlotheira. Ventral valve. Fanning Old Station. 
Do. Dorsal valve, and umbo of the ventral. Fanning Old Station. 
Do. Side view of the united valves. 
Pentamerus brevirostris, Phillips. Section of the ventral valve, exposing the 
septum. Fanning Old Station. 
Spirifera curvata, Schlotheim. Portion of a decorticated ventral valve. 
Fanning Fiver. 
Atrypa desquamata, Sby. A much worn and rather distorted ventral valve. 
Broken Fiver. 
Pentamerus brevirostris, Phillips. A variety, with indistinct costae on the 
flattened and undefined fold. Fanning Old Station. 
Do. Side view of united valves. 
Do. Dorsal valve and umbo of the ventral of another specimen, 
showing a strongly-produced sulcus in front, slit of the 
septum on the ventral umbo, and those of the dividing 
lamellae on the dorsal. Fanning Old Station. 
Orthotetes concent rica, Eth. fil. Yentral valve, with a high umbo and 
concentric laminae. Fanning Old Station. 
Do. Dorsal valve of the same, with very fine radiating striae. 
Fanning Old Station, 
Do. Side view of the united valves. 
Amplexus, sp. ind. Side view of calice. Broken Fiver. 
Do. Horizontal section, with the marginal septa, and large central 
tabulate area. X 2. 
Spirifera bicarinata, Eth. fil. Yentral. valve and one of the alar expansions, 
x 1|. Iveelbottom. 
Productus, sp. ind. (resembling P. Ilumboldti , D’Orb). Yentral valve, 
with coarse elongated spines. Mount Britton Gold Field. 
Chonetes, sp. ind. Internal cast of the dorsal valve. Mount Britton Gold 
Field. 
Chonetes, sp. ind. Impression of a ventral valve, with deeply bifurcating 
costse. X li. Keel bottom Fiver. 
Chonetes, sp. ind. Impresson of a rather deltoid form, x 2. Keelbottom 
Fiver. 
Chonetes, sp. ind. x 2. Keelbottom Fiver. 
