Second Contribution

to the

Studies on the Cambrian Faunas

of

North America

by

  Charles Doolittle Walcott
United States Geological Survey

Bulletin of the USGS #30

1886

REVIEW OF THE STRATA AND FAUNAS 012

Plantae, Spongiae, Hydrozoa, Echinodermata, Brachiopoda, Lamellibranchiata, Gasteropoda, Pteropoda, Crustacea, Poecilopoda,

DESCRIPTION OF THE MIDDLE CAMBRIAN FAUNA

DESCRIPTION OF A PTEROPOD FROM THE UPPER CAMBRIAN. 223  224  225

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PLATES.

#	Click for plate at 100 ppi	DESCRIPTION
01	Plate at 300 ppi	description Spongiae Ethmophyllum profundum L'Anse au Loup, Labrador Middle Cambrian also Plate 2, Fig. 3; Plate 4 fig. 3  084
02	Plate at 300 ppi	description Spongiae Fig. 2 Leptomitus zitteli. Parker's Quarry, Vermont Middle Cambrian Hyalouema showing silicious spicules natural size  089
03	Plate at 300 ppi	description Spongiae Archaeocyathus atlanticus Archaeocyathus billingsi
04	Plate at 300 ppi	description Spongiae Fig. 1 Ethmophyllum Whitneyi Silver Peak, Nevada Middle Cambrian  081
05	Plate at 300 ppi	description Spongiae Ethmophyllum rensselaericum ridge East of Troy, NY Middle Cambrian, Georgia Formation length 0.3" 085
06	Plate at 300 ppi	description Echinodermata Eocystites longidactylus Also Plate 5, Fig. 3. Chisholm mine, MN natural size 094
07	Plate at 300 ppi	description Brachyopoda Fig. 1 Lingulella caelata, 2x ridge East of Troy, NY Middle Cambrian, Georgia Formation 095
08	Plate at 300 ppi	description Brachyopoda Fig. 1 Acrotreta gemma, 3x Middle Cambrian Pioche, Nevada  098
09	Plate at 300 ppi	description Brachyopoda Fig. 4 Acrothele Subsidua Middle Cambrian Antelope Springs, Utah  108
10	Plate at 300 ppi	description Brachyopoda Fig. 1. Obolella crassa Middle Cambrian Conglomerate Limestone ridge East of Troy, NY  114
11	Plate at 300 ppi	description Fig. 1. Obolella chromatica Brachyopoda Middle Cambrian L'Anse au Loupe, Belle Island, Canada  112 Fig. 4, diplograptus simplex Protospongia Middle Cambrian, Georgia Formation Parker's Quarry, Vermont   092
12	Plate at 300 ppi	description Fig. 7 Salterella pulchella Pteropoda Middle Cambrian, Georgia Formation L'Anse au Loup, Labrador  141
13	Plate at 300 ppi	description Pteropoda
14	Plate at 300 ppi	description Pteropoda
15	Plate at 300 ppi	description Crustacea Protocaris marshi "Oldest Phyllopod crustacean known at the present time." Middle Cambrian, Georgia Formation Georgia, Vermont.  148
16	Plate at 300 ppi	description POECILOPODA
17	Plate at 300 ppi	description Olenellus
18	Plate at 300 ppi	description Olenellus gilberti
19	Plate at 300 ppi	description Olenellus
20	Plate at 300 ppi	description Olenellus
21	Plate at 300 ppi	description Olenellus gilberti Also plates 18-20 Middle Cambrian  170 Figure 1 Figure 2
22	Plate at 300 ppi	description Olenellus Thompsoni Middle Cambrian Parker's Quarry, Vermont  167
23	Plate at 300 ppi	description Olenellus Thompsoni Middle Cambrian
24	Plate at 300 ppi	description Figure 1a Mesonacis vermontana Middle Cambrian, Georgia formation Parker's Quarry, Vermont  158 Figure 1b Paradoxides rugulosus  162
25	Plate at 300 ppi	description
26	Plate at 300 ppi	description
27	Plate at 300 ppi	description
28	Plate at 300 ppi	description
29	Plate at 300 ppi	description
30	Plate at 300 ppi	description
31	Plate at 300 ppi	description
32	Plate at 300 ppi	description
33	Plate at 300 ppi	description